Monster Girls
This is all the basic information on monsters and monsterization available in Monster Girl Encyclopedia I.
Monsters
Monster is a general term for various races that take on a variety of forms with diverse traits. The demon lord is at the top. The monsters used to be giant beasts, insects, dragons, etc. that attacked and preyed upon humans. They were truly frightening horrors, but since the ascension of the current demon lord, at present they have changed and taken on woman-like forms. The way they act towards humans, and their relationship with humans has also changed considerably.
In this book, the author has published 100 articles for specific monster girls. Before we look at the 100 individuals, let's receive some basic information about monsters.
Concerning Monsters
At present, due to the influence of the current demon lord, a succubus possessing tremendous power, all of the monsters have forms like that of either an extremely beautiful, or cute human woman.
Their forms are highly varied, running the gamut from being hardly any different from human, to only having the upper body of a woman, with the lower body of a serpent, fish, spider, etc., features of a beautiful, alluring human woman mixed with grotesque traits. Presently, as is visibly apparent, all individuals are female; a male has never been observed. Most of the monsters are more instinctual compared with humans. Their thoughts and actions are all based on desire and dedicated to the pursuit of pleasure. Compared with humans, many of them have greater physical or magical capabilities. They have various special abilities that humans do not possess. Intelligence varies greatly depending on race, but all of the monsters are at least smart enough to have a command of language. It is possible for them to converse with humans. They have long life spans compared with humans. (It varies depending on race, from only a little longer than humans, to those who live for thousands of years.) No matter how old they get, their forms remain young and beautiful, and they never physically age any further than that.
Diet
The feeding habits of the monsters can be generally split into two different types. One eats ordinary food, like the meat of animals, vegetables, fruit, etc. The other type, which sustain themselves on a type of vital energy called “spirit energy” that is contained in the body of humans, and especially plentiful in men, has increased due to the influence of the current demon lord. Those monsters that sustain themselves with spirit energy, gain spirit energy as it flows out together with saliva, semen, etc. Inside of their bodies, it is converted into nourishment and demonic energy. Also, this process will not kill a man. It is also possible for monsters that use spirit energy as their main source of nourishment to gain nutrients from eating ordinary food, but it is comparatively far less efficient. On the contrary, it is also possible for those monsters that mainly eat ordinary food to take in spirit energy as their own demonic energy. A man's spirit energy is delicious and appealing to all monsters. It is their number one treat.
Additionally, in the age of the former demon lord, the monsters preferred to consume human flesh, but the present monsters instinctively find it disgusting, and to them, it would be unthinkable.
Reproduction
As is visibly apparent, monsters are only female beings. For that reason, they absolutely must have a human man in order to reproduce. From their perspective, human men are like males of their own species. The monsters have a powerful instinct which compels them to get pregnant, and bear the children of a man they fancy. It is one of the things that gives them the most joy of all. Currently, children born between monsters and human men all end up becoming female monsters. The birth of a male between a human and a monster has never been confirmed.
Monster Assault Against Humans
As written in the items above, they absolutely can't do without a man, both as a source of food, and as a breeding partner. For that reason, monsters strongly seek human men by instinct. When they find a human man, they follow their instincts, aggressively assaulting him, and knocking him down in an attempt to initiate intercourse. By nature, the monsters' instinct equips them with the knowledge of methods and techniques for pleasuring men. If a man has intercourse with one of them even once, he won't be able to help but be drained of spirit energy, becoming their prisoner.
If it turns out that they're fond of a man, they won't let him go even after they get their spirit energy. They'll keep him at their side as a permanent source of spirit energy. Men who become imprisoned in this way, don't even try to escape from them. So it's not at all uncommon for men to get stuck with them forever, never to return after being attacked. Also, they use all of their good looks, magic, great physical strength, and special abilities to secure a man. Besides direct assaults, on the contrary, they also use charms, magic, pheromones, etc. to tempt men into assaulting them themselves. They may also simply seek intercourse after befriending a man, etc. They use various methods to get a man and have sex. To the monsters, having intercourse with a human man is the greatest pleasure, surpassing anything else. This desire comes from their most deeply rooted instinct.
Monster Values
Getting a human man and having sex is the number one principal of behavior for monsters, so of course their thoughts, actions, and values reflect that. When monsters converse together, that is often the main subject of discussion. Lasciviousness is considered a virtue, and in true monster fashion, even the youngest children dream of lustfully having sex with men; if they can catch a man off guard, they will attack. They often use very coercive methods to get the man who strikes their fancy. Even if the man is disgusted by monsters and sex, they'll use sex, seduction, spells, drugs, and various means to make a prisoner out of the man.
Also, since they have strong sexual urges themselves, unlike most human women who tend to regard a man's sexual desires as filthy, they view it in a positive light. On the contrary, they would be overjoyed to have a man aim his carnal passion at them himself. They would attack him at once and jump straight into sex to help alleviate those desires. They have a powerful, unconditional affection for men. They have to have a man for food, and for reproduction. Since men are so necessary to them, killing humans would be unthinkable. No matter how ferocious and sadistic the monster, they would never kill a human being for any reasons other than self defense, or protecting their husbands.
Monsters' Relationship to Human Men
Monsters form married couples in the same way the humans do. Since there are only females, they do of course take human men as husbands. To monsters, being husband and wife isn't just about emotion and contact. When they really like a man, their interest and desire towards him surges. They start to greatly prefer his scent, and the particular taste of his spirit energy. Put another way, their interest in other men dwindles, and they start to wanting only that man as their male. In such a situation, their instinct has recognized a man as being their husband. Because of this, even though the monsters have extremely high sexual desire, and are dedicated to the pursuit of pleasure, once they've settled on a man as their husband, they whole heartedly attend to him, treating him even better than they treat themselves.
Regarding the reason why they have these traits, it has been said that “it's that way so that they don't fight over prey with other monsters,” “further charming a man results in more stable spirit energy production, as well as higher yield,” etc., but it may also simply be explained that the personality of the current demon lord who changed their traits is showing up in the instincts of the monsters. Also, perhaps for the same reason, they tend not to attack men who are strongly stained with the odor and demonic energy of another monster. However for some races, it's fundamentally accepted that a man will have many wives, and he'll just keep having sex with the many monsters who love him one after another, or perhaps keep going with several at once. He would have to offer a huge amount of spirit energy. Furthermore, depending on the monster, there are some that treat men as prey or slaves, but in this case, prey or slave means the same thing as husband. In spite of the words used, a strong love can be seen through their attitude toward and treatment of their men.
Monsterization
Monsterization is the phenomenon where humans and other races change into monsters by having mamono mana inside their body. It's mostly human women that become victims of monsterization, although there are a few exceptions. Regardless of race, it is purported that monsterization can basically only occur in females. In the section after this, we'll be explaining how human women change into monsters, but the orientation and magnitude of the changes to the body and mind vary depending on each individual and what monster race they are changing into. We would like you to bear in mind that, as with “monster ecology”, the commentary presented from here on is just a general explanation of the average monsterization phenomenon, and transformation.
Outdated Encyclopedia 1 content below.
Monsterization is the phenomenon where humans and other races are transformed into monsters by being infused with demonic energy. Monsterization basically only occurs in women. The Succubus is a typical monster that possesses the ability to transform humans into monsters via demonic energy.
The Process of Transforming Into a Monster
Monsterization occurs when demonic energy gets inside the body of a woman. The most typical way for this to happen is by infusion of demonic energy through sexual intercourse, as done by the Succubus, etc. , but there are various other processes through which demonic energy could invade a woman's body and change her into a monster.
Women who have had demonic energy poured into them will have the mana within their body discharged as if driven out by the other energy. Otherwise, their energy will be converted into demonic energy, as if it were being swallowed by the demonic energy.
Whatever the case, monsterization is completed at the same time as they completely lose their energy, and a woman will end up being reborn as a monster. When demonic energy gets inside a woman's body, it causes her body to flush, and dimly dulls her thoughts. This ensures that she can't resist the temptation and pleasure from a monster, and makes it so that she will receive an even larger amount of demonic energy. The more the body becomes brimming full of demonic energy, in proportion, the closer her mind and body approach that of a monster.
Demonic energy changes the body into a monster-like, sensitive one that can greedily receive pleasure. Even the kind of pleasure that monsters enjoy regularly is far too strong and intense for humans, and it would shake them. Pleasure like an electrical shock would paralyze them to the degree that it would even immobilize their mind and body, staining them completely in the color of pleasure. In the same way, the more the body becomes filled with demonic energy, the more changes appear. If energy flows out of the body as demonic energy is poured in, so too does everything that gets in the way of receiving pleasure such as inhibitions, reason, self-restraint, and repugnance for monsters and pleasure, etc. It probably feels as if the heart has become lighter. Once the heart loses everything excessive, before long, it is filled with “a good feeling” that makes a monster's desire to seek and enjoy pleasure sprout. If spirit energy starts to change into demonic energy, at the same time, human values and thoughts are painted over by devilish pleasure, and one can understand that she's changing along with a sense of pleasure and depravity. For humans, the sensation of demonic energy swelling within their body and mana changing into demonic energy is accompanied by an extremely sweet feeling.
Just before completely changing into a monster, one can sense that she's being enveloped by thick demonic energy, and having her body filled by it is felt as a wonderful thing. And then, due to monsterization, the body will begin to transform and what they are likely to feel when parts that they lacked as a human start growing from their body is intense pleasure, and a strong feeling of liberation. Upon experiencing this sweet sensation, even their tears that had at first come from fear, sadness, and despair change into tears of joy for having become a monster by the time they transform.
Even in the case when one escapes before completely becoming a monster, the demonic energy that entered the body usually never disappears. If it's an extremely miniscule amount, then it will disappear after a while, but if the amount is larger, then it's often too late even for those who haven't yet turned into a monster. Demonic energy remaining in the body continues to alter the body and mind from within. Once the body has tasted the sweet sensation of demonic energy flowing inside, one is unable to forget the decadent pleasure of a monster, and her body will burn hotly. Her mind will be troubled by obscene thoughts and images, and the erotic dreams she'll be having every night, and desire will grow. Eventually she'll become unable to bear it, and she'll descend to a monster on her own seeking the pleasure of a monster, and to transform into a monster.
Furthermore, spirit energy is the vital energy possessed by humans. In other words, it could also be called “human magical energy”. Of course the kind of women referred to as heroes and great sorceresses also possess lots of this energy. When they have their body violated by demonic energy and are monsterized, this vast amount of spirit energy is converted into demonic energy, so the more powerful someone was as a human, the more powerful and lascivious the individual will become as a monster as well.
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Monsterization occurs when demonic energy enters the body of a human woman. There are several methods for changing a human into a monster, but typically they are infused with demonic energy through sex. When a human woman has sex with a monster, she has all of her spirit energy stolen away and replaced by the demonic energy that pours inside. Once a woman has been infused with demonic energy, her body grows hot, and her thoughts grow vague. Eventually, the demonic energy she was infused with gives her pleasure while gradually remaking her body into that of a monster. Reason rapidly melts away as she indulges in the pleasure of sex with a monster, and the sweet sensation of her body changing to a devilish nature from the inside. Her mind becomes full of nothing but thoughts of pleasure, and before long her body and heart will both be changed completely into that of a monster.
There are also other methods of monsterization besides sex, such as being bitten, having demonic energy pour into the body through a wound, expelling spirit energy, also, when a woman spends a long period of time in certain lands such as the demon realm where demonic energy is contained in the air, or by taking a medicine made with the demonic energy of a succubus. Besides these, there are also some stranger ways of changing a human woman into a monster such as laying eggs inside of her, or having her inhale spores introducing a parasite.
Those Who Have Changed Into Monsters
When human women change into monsters, big changes appear in both their body and mind. Basically, their values and thoughts from when they were human disappear, and change into the monster thoughts and values, but they're different from those of monsters that were born a monster. There are also sensations they can feel and values they possess especially because they were originally human. Let's focus on that point, and explain what sorts of changes happen to them.
The Body After Transforming Into a Monster
The appearance of women who has become a monster changes hugely. Their appearance is altered based on their appearance from when they were human. Their face becomes devilishly beautiful or cute to the degree that eyes of men are always drawn to them. The body changes into a charming body that inspires carnal desire in men. While their appeal is different depending on the race and the individual, with everything from mature adult women, slender, beautiful girls, and little girls with decadently soft skin, every monster has an appearance that looks beautiful or cute to a typical human man. It's the same for those who change from human to monster. No matter who the woman, once they change into a monster they will change into a beautiful and lovely form for tempting men.
Furthermore, the change is always based on their face from when they were human, and in most cases, the changes occur along the lines of accentuating the attractiveness of the original, so, for example, even if there are huge changes, it's not like they change into a completely different person. It always ends up so that they bear a strong resemblance to the original woman.
As for additional huge changes, the color of the skin will change to match the characteristic of the monster's race, and the organs and parts characteristic of the race will appear. Beast ears and tails, demon horns and wings, etc. will grow, and depending on the race, the lower body may also change into a grotesque form.
Compared to humans, monsters have extremely tough bodies and high physical abilities. Also, since monsters mostly don't catch the kind of diseases that humans catch, even if their body was weak as a human, or they were afflicted with an illness, they mostly become healthy due to monsterization. To those who had lived in a human body up to that point, with a monster's body, it is likely to feel like they're in a good condition and capable of doing anything. Compared to when they used to be human, their body feels lighter as if freed from bindings, whereas before, on the contrary, it used to feel heavy.
Also, to those who were born as monsters, it's just normal, so it's a hard to understand the feeling, but according to those who used to be human, compared to when it was a human body, a monster's body, which always actively seeks men, feels as if it's engulfed in a sensation of warmth and exaltation.
After a while, the body feels hot, and blood rushes to their head, and then they'll seek to have sex for the first time after becoming a monster, and they'll attack a human man. Also, the way to use their body is engraved in their instinct, so they can probably move freely and use it right after becoming a monster. Naturally, as soon as they change into a monster, the methods of how to attack men, milk spirit energy and use their body are imprinted in their instinct, so right after changing into a monster they can actively attack men and enjoy spirit energy and pleasure.
A monster's lewd body is extremely sensitive compared to that of a human woman so that they can actively receive pleasure. If one has sex with that body, the amount of pleasure received is many times greater than the pleasure that can be obtained by having sex with a human body. In the case of human women, the pleasure is so powerful that their mind cannot process it and they'd pass out, but in the case of monsters, their level of tolerance for pleasure is in another league, so they can enjoy that sort of pleasure and indulge in it. The devilish pleasure experienced by those who have sex with a man for the first time after changing from a human to a monster makes them reconfirm how wonderful it is that they've changed into a monster and they are a monster. It's enough to make them think “I can't go back to being human anymore,” or “I don't want go back to being human.” Once this happens, they become a prisoner of the lewd body they obtained by becoming a monster, and the pleasure of using it, and in monster-like fashion, they just keep becoming even more lascivious than those who were monsters to begin with.
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Even after they become monsters, the base is still their original human woman form, and the looks of the woman from when she was human are very much well-preserved; however, her face becomes more devilishly beautiful in a way that attracts men, and her body changes becoming more attractive as well, such to strongly arouse the carnal desires of men. And then, the parts and organs that are defining characteristics of her particular race start to appear (such as the horns, wings, and tail of a succubus).
The sexual desire of a woman who has become a monster swells exponentially, and her body naturally throbs, seeking men. In order to taste pleasure more rapaciously, it becomes extremely sensitive. Having sex in the body of a monster gives them a devilish pleasure unlike anything they could have ever experienced while human, which likely makes them become it's prisoner. Also, the special abilities and various techniques for pleasuring men are gained automatically through instinct along with the new body, so they are able to use them naturally even immediately after having just transformed. Soon enough, they'll be trying to use them to obtain a man.
The Mind After Transforming Into a Monster
As with the body, the changes caused by becoming a monster have a huge impact on a woman's mind. Those former-humans who became monsters don't feel fear or despair from having changed into a monster or changed into a grotesque form. Even if they experience despair until just before or right after the transformation, it will disappear in an instant. If one transforms into a monster, she'll literally be engulfed in a feeling of liberation and ecstatic joy as if she has been reborn. The joy of having obtained a devilish body that can bewilder men and make them drown in it, magnify the pleasure of sex by many times, and enjoy and indulge in it. And then, arousal and the anticipation of using and enjoying that body plenty from then on washes away despair and such.
As for women who become monsters, the disgust and resistance towards sex that they had when they were human disappears, and a monster-like thirst for pleasure and spirit energy wells up. Moreover, so that they can indulge in it, they are released from the inhibition and restraints, etc. that were troublesome when they were human. The heart will feel lighter, almost like being in a dream, enveloped by a fluffy, happy feeling. And then, as if to trade places, the affection for human men necessary for satisfying the thirst for spirit energy and pleasure will overflow endlessly. By becoming a monster, they become able to sense the odor of men's spirit energy, and the obscene desire that men direct towards them. And then, they end up recognizing them as wonderful things.
Due to this, they realize that men are delicious-looking, cute, and very wonderful things that will satisfy their own desires. If they become like this, then afterward, they'll already be ruled by a monster-like desire to assault and have sex with men. No matter how prudish they were and how much they hated men to begin with, they'll end up strongly wanting and loving men. Additionally, upon changing into a monster, if there's a man they want, then they'll just give into desire and seek him. Upon realizing that they themselves are equipped with the body, beauty, and ability to imprison a man and make him their own, their heart will be overflowing with self-confidence and hope.
The desire for men that's taken root in them, and this self-confidence, will make them arrive at such thoughts as “If a man hates and fears me, then I'll just thoroughly ravish him and make him my very own prisoner,” “If my feelings are unrequited, then I'll just thoroughly gratify him and make it so that he can no longer live without me,” and will cause them to attack men without hesitation.
And then, once they know the pleasure of sex with men and the taste of spirit energy, to someone who lived as a human until that point, it's something that feels like the most wonderful happiness they've ever felt in their entire life. It's said to be so much so that they'll even come to regret their human past, thinking something like “Why didn't I realize all this time that there was something that felt this good, something that was this delicious, and that becoming a monster was something so wonderful?” After that, as if trying to make up for the period when they were human and unaware of such pleasure, they'll become engrossed and keep having sex, and they'll end up continuing to indulge in pleasure as if to verify the happiness of becoming a monster and getting what they want.
Also, as with the body, their personality and memories from when they were human will end up largely remaining intact. As with the body, the changes brought about by monsterization will mostly accentuate the appeal of their original personality. At a glance, it might seem as if their personality hasn't changed at all from before, but monsters always acquire a monster-like, lustful personality without exception, and their thoughts are disposed to end up being hedonistic.
For example, a shy village girl who was afraid of men will retain her looks that spur a man's desire to protect, and modest personality, but she'll start to actively tempt a man, deliciously suck and lick a penis in her mouth, straddle a man's lower body, and furiously ravish him. A diligent female knight that never missed a day of practice and gave off an air of nobility will retain her diligence, and she'll mount a man's body every single day and perform sex. Her normally noble attitude and appearance would be retained, but she would become pleased to receive a man's desire to tarnish her noble figure with his body.
Among them, there are some changes to personality that match the race, and certain flaws and feelings of inferiority that a person used to have will change to become erased, etc. so there are also those whose personalities change greatly, but on the other hand, there are also those who used to pretend to be something they were not when they were human, so when their true personality comes to the surface, it looks like their personality changed. However, even in such cases, the original personality is never lost entirely, and each individual's essence doesn't change. There's always a part that remains which makes one feel a “resemblance” to the original individual from before they became a monster.
Moreover, personality changes such as these appear in a monster-like direction to ensure that they feel fondness and desire towards men, and depravity, etc. Additionally, by changing into a monster, a sadist who enjoys inflicting wounds on others and making them suffer will change into a sadist who enjoys forcibly raping others and pleasuring them willingly or unwillingly. In monster-like fashion, they'll change to have a sense of disgust towards killing humans. Due to these changes, there are probably also those whose personalities appear to improve by becoming a monster.
Concerning a person's memories from when they were human, they're basically carried over unchanged even after becoming a monster. Sometimes memories that the person herself desires to forget become fainter, but omitting some exceptions, memories are almost never modified.
A person's feelings and affection towards people, of course, remain intact. On the contrary, by becoming a monster, the very incarnation of love and desire, the love swells up enormously inside them. Feelings towards a man that one possessed as a human will end up blossoming by becoming a monster, for instance if there was a man that they had a strong love for such as a boyfriend, husband, or lover, etc. then the lascivious desire directed towards him swells up. A monster's instinct will recognize him as her husband, and after becoming a monster, the body and mind will start to change to belong exclusively to their husband even before they have sex.
For that reason, a woman who had just become a monster that we would normally expect to have such a powerful urge for sex that she would just push over anyone and have sex with them without caring would actually become able to sensitively detect her husband's spirit energy, and pursue the hints of his presence, and she would head straight to him without even glancing at other men.
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Just as with the body, the personality and memories from when they were human largely remain intact. However, the mind is warped by monsterization. No matter whether they were once a fastidious man hating female knight, or a timid village girl unable to even speak to men, the women end up becoming extremely lustful as though they had never even been human in the first place. They become extremely aggressive about getting sex from men. The sense of shame, and self-restraint, as well as the feelings of disgust and resistance towards sex and monsters disappear completely. They will start to assault men in pursuit of pleasure and spirit energy as though it were only natural.
Their heads become filled with many thoughts of human men and pleasure, they naturally utter words of temptation from their lips to seduce men, and they behave in a coquettish manner to arouse them. In this way, their thoughts and values become entirely overwritten by the instinct of a monster. They become freed from all the restraints and fetters that bound then when they were human, giving into desire and getting it on with the man they fancy, indulging in ecstatic pleasure as monsters. After just becoming monsters, women are driven wild by the radical sensations and thoughts they experience, which will lead them to follow their instinct and attack a man. If they have memories from when they were human of a man they deeply loved, the monsters' instinct will cause them to recognize the man as their husband, and they'll head straight to him and unleash all their desire.
Why Transformation At All?
Monsters basically have an instinct to attack human men, but some among them have an instinct to attack women to increase their allies, and there are some who just try to attack women on a whim. Before we get into the reasons, first we'll explain how monsters think of human women.
Presently, the Mamono Lord has an ambition to unify them into one race, with humans as males, and monsters as females. For that reason, as far as monsters are concerned, human women are beings that are destined to subsequently become the same race as them. As with human men, they approach them with affection, and don't like hurting or killing them for no reason.
Also, when they see human women unable to fulfill their desires, and bearing it patiently when their desires are inhibited by human rationality or human society, etc., monsters feel sorry for them. When a monster sees the way many adherents of the Order have disgust for sex and pleasure, and try to distance themselves from it, it makes her think it’s a waste: “How could she not know something that feels so good?”
When the monsters that live happily amid pleasure see a woman like that, they unconsciously end up feeling like teaching the woman about the joy of sex. Monsters that have converted human females into their own race in this way have fun and enjoy watching the uninhibited appearances of those they personally changed into monsters such as the sight of a woman who used to be troubled by being unable to fulfill her desires pushing down her loved one and imprisoning him using her own power, or the sight of a little girl that had never known pleasure until then, drowning in pleasure, falling and becoming lascivious, etc.
In this way, surprisingly, the reason monsters change human females into monsters is mostly to meddle, or just for amusement.
Also, women who changed from human to monster have a more remarkable tendency to do so. They're extremely aggressive about changing human women into monsters. They know the joy of changing from a human to a monster, something that those born as monsters have never tasted. Additionally, since they have memories and feelings from when they used to be human, they compare their current life to their old one, and they think life as a monster, indulging in pleasure and spirit energy, and spending one's time making love with a man, is extremely wonderful. To them, the wonderful world that they now live in that's full of desire and the odor of men's spirit energy inspires them as a female, but compared to it, the world when they used to be human will likely be regarded as extremely hollow. For that reason, they want to share pleasure and happiness with human women, and they think that women should abandon their humanity as soon as possible and join them on this side. In order to free them from the shackles of humanity, and guide them to the paradise known as monsterhood, they aggressively attempt to change human females into monsters.
Also, in addition to such thoughts, there are those among the monsters who regard human women as incomplete beings, who don't even adhere to the monster’s principles of faithfulness and are unable to imprison and rule men through pleasure. There are even those who believe all women should become monsters, and they aggressively try to convert human women into monsters whenever they find them. Monsters with these kinds of beliefs are called “radicals”.
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Basically, the monsters have an instinct that causes them to seek out human men, but occasionally, they'll also attack women in order to convert them into monsters. Reasons for that may be to increase the ranks of their allies, to repel human women who are trying to slay them, and various others.
Also, some of the monsters have the distinctive feature of going about changing women into monsters just for the hell of it to amuse themselves, and they can be quite officious. Whenever they encounter women who either don't know, or hate and renounce pleasure, or women who are troubled because they find themselves unable to express their affection for a man, they will assault them in order to teach them the joy and happiness of indulging in the pleasure of sex with men that they themselves experience. And then, after instructing her in the ways of pleasure and changing her into a monster with their own hands, they enjoy watching the sight of the woman who once had love problems as she follows her instinct, assaulting the man, then moving her hips happily on top of her beloved, drowning in pleasure. Those who went from being human to being a monster know the ecstasy of monsterization and the happiness that follows it, so they tend to be more strongly inclined to doing it.
Incubization
An incubus is mainly a human man that kept receiving mamono mana, and containing it within his body, resulting in a transformation into a being that's convenient for monsters, possessing superhuman stamina and lust. Under the current concept, monsters are all female beings that only possess mamono mana, so an incubus, which is male, and possesses both mana and mamono mana at the same time, is not a monster. Ultimately, they're just humans altered by mamono mana. However, the Order regards them as being the same as monsters, and they're targeted for expulsion and suppression.
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Human men who have been violated by demonic energy, whose nature is vastly changed. They are often also treated as monsters, but technically all monsters are female, so no matter what, the incubi are just humans who have taken their nature from monsters.
Transformation Into an Incubus
Compared to monsterization, in which changes suddenly appear, changes caused by incubization are extremely gradual. Unlike a woman's monsterization, where they totally change into a monster both mentally and physically after having sex one time, the changes that occur when a man transforms into an incubus and afterward, appear bit by bit each time he has sex with a monster.
Human men transform into an incubus by having sex with monsters, and having demonic energy poured inside of them. Unlike women, who recover spirit energy by absorbing it from the air, men continue to produce spirit energy within their own body, so compared to women, it's more difficult for demonic energy to take hold, and they do not change into an incubus just from having sex once.
In the case of the succubus family of monsters, they possess “succubus' energy” which has a higher retention rate, and causes men to release more spirit energy in a single session of sex by infusing them with it, so compared to other monsters, incubization is extremely fast, and in the case of a powerful succubus, it's even possible to change a man into an incubus by having sex once.
Also, even if it's a monster of another race, after spending a long time as their husband, and living beside them, by continuing to have sex, demonic energy gradually takes hold in the body after each time, and eventually, a man will transform into an incubus.
Additionally, even monsters not of the succubus family can accelerate the incubization process by continuing to ravish a man with multiple monsters, and aside from that, there is “succubus' secret elixir”, a medicine made from succubus' energy, and there are special rituals and spells that can be used to quickly change a man into an incubus.
When transformation into an incubus occurs, it's not like one can clearly tell that he's transformed, as was the case when a woman is monsterized. In the case of monsterization, a woman is able to grasp that she's become a monster because of the changes in her body, and a feeling of ecstasy like she's been reborn, but in the case of incubization, before one knows it, he's already changed into an incubus.
In the course of getting continuously violated by monsters over and over, a man who at first would tire soon, exhaust his spirit energy, and pass out, will steadily increase the amount of time he can have sex, and the number of times he can release spirit energy increases. In the beginning, the pleasure is so violent that one can't even think straight, but one gradually becomes able to enjoy the pleasure. Gradually one will change so that he can't help but consider having sex with the monster in front of him, and gradually, he'll come to desire to be ravished by the monster before his eyes. In this way, bit by bit, one will change into an incubus without being aware of it.
What makes an incubus an incubus, and a man a man is the spirit energy within his body and the existence of a spirit energy production faculty. Very rarely among the incubi, there exist those who unconsciously destroy their own spirit energy production faculty. In that case, spirit energy will not be produced, and the body of an incubus who loses spirit energy and is completely ruled by demonic energy will completely change into a monster. This monster is called an Alp. The process of changing into this monster is described in the sex change case file.
Outdated Encyclopedia 1 content below.
Transformation into an incubus mainly occurs when a man continues to have sex with a monster, continuously receiving her demonic energy in his body. After becoming an incubus, their physical appearance hardly changes at all from when they were human; however, they gain vigor and lust like that of a monster, far exceeding that of a human. Their thoughts and values change, all becoming centered around having sex with monsters. Their body also gradually changes to become more suited to having sex with them. In addition to ordinarily eating food, just as the monsters sustain themselves on spirit energy, the incubi become able to live by sustaining themselves on the monsters' demonic energy. Through this, the lifespans of the incubi are also extended to match that of the monster whose demonic energy they use to sustain themselves. Furthermore, both the volume and quality of the spirit energy produced inside their bodies increases by leaps and bounds. They are an extremely convenient existence for a monster. It's probably fair to say that they are the equivalent of male monsters.
By continuously having intercourse with a monster from the succubus family, a man can be transformed into an incubus comparatively far more quickly; however, even in the case of the other monsters, after spending a long period of time at her side as her husband and having frequent intercourse, a man will probably eventually change into an incubus even though the changes are very gradual. Among the monsters, there is a medicine made from the demonic energy of the succubus in circulation that is called “succubus' nostrum.” Many monsters like having their husbands drink it in order to try to change them into an incubus more quickly. Also, the incubi possess the same kind of demonic energy inside their bodies as the monster who changed them into an incubus, and if they have sex with human women, the women will be transformed into monsters.
Mental and Physical Changes Caused by Incubization
As for changes caused by incubization, the changes that appear basically make it convenient for the monster that one is coupled with.
First, it is purported that the looks almost don't change at all compared to when one was human. Monsters don't care very much about the attractiveness of a man's face, so in most cases there are no changes whatsoever. The body changes to become more healthy and durable so that it's convenient for sex, but it's rare for the appearance to change greatly other than that.
A rare exception occurs and the appearance greatly changes in the case of those who are too feeble or fat, and their form will be vastly improved so that it's convenient to have sex with monsters. Also, in the case of those who are so old that it's a hindrance to sex, they will also be rejuvenated.
After one has changed into an incubus, the mind also changes so that one's values become nearer to those of the monsters, but compared to monsterization, even if only a little bit, human-like values from the period when one was a human will remain. However, the values and thoughts of an incubus, a being that became a monster's prisoner so much so that it altered the nature of his mind and body, will change to become eager to have sex with monsters. One's lust will swell up like that of the monsters, and disgust towards monsters and sex, etc. will have long since disappeared, and one will change so that he aggressively desires sex with monsters.
Also, after being completely charmed by a monster, one's aesthetic sense will have changed so that he feels that the grotesque parts and organs of monsters are beautiful. Other than that, one's sense of time, and values concerning work and recreation will also change so that it becomes more convenient to live with monsters.
The biggest changes of all occur in the functions that are also most important to monsters that get used during sex. It depends on the race and preferences of the monster that one is coupled with, but most men who become an incubus will have their penis grow larger by leaps and bounds, and they'll be able to please monsters even more. The amount of semen and spirit energy released from there will be incomparable to when they were human, and they'll have boundless stamina so that they're able to release it again and again without getting exhausted.
The quality of the spirit energy is also remarkably different. It becomes so much thicker, stickier, and sweeter, that it's incomparable to when they were human, and one lick will make a monster melt. Also, human men sometimes lose the mood after expelling spirit energy, but it doesn't occur in an incubus, and their lust for monsters just flares up.
In addition to the normal food that they ate when they were human, it's also possible for an incubus to feed on demonic energy by having sex with monsters. For that reason, an incubus never gets exhausted when having sex with a monster. Instead, their entire body will brim full of lust and energy due to demonic energy. When the body of an incubus obtains demonic energy by having sex with a monster, it will immediately produce spirit energy. When this spirit energy is released to a monster, the monster will produce demonic energy from it and pour it into the body of the incubus.
Astonishingly, with this cycle, not only does the total amount of magical energy not decrease, instead it continues to increase, so it's possible for a monster and an incubus to keep having sex almost forever, and as long as there's one incubus and one monster, it's possible for them to live by just having sex. As far as the divinities and the Order are concerned, this nearly perpetual cycle is something that is in violation of divine providence that will greatly throw off the laws of the universe, and is extremely viewed as a problem.
Also, it's said that the lifespan of men who become an incubus becomes dramatically longer. Since they can keep living by having sex with each other, their lifespan is roughly the same as the monster that they're coupled with. Just like monsters, their appearance stops aging at a certain stage. It could be as a boy, as a young man, or as a mature man. Since an incubus is a being that's convenient for a monster, they change depending on the tastes of the monster that they're paired with. In this way, an incubus is none other than an ideal male to a female monster.
The power of an incubus grows stronger the more demonic energy they accumulate. In the case of those that periodically have sex with multiple monsters, it piles up, so in the case of a single incubus that makes a harem of multiple monsters and keeps having sex with them, it ends up causing the birth of an extremely powerful incubus. Regardless of how many monsters are in the harem, an incubus has limitless stamina and lust, and can have sex with all of them. Even if an incubus keeps having sex with them day and night alternatively for a period of several days, he'll never get tired, lose his erection, or feel pain or boredom. On the contrary, he'll end up being unable to get satisfied unless he has sex with all of the monsters in the harem, and it'll even get to the point where it's as if spending several days having sex with all the monsters in the harem is like having sex one time to him.
Additionally, those who become an incubus can also adapt to the environment to match the monster that they're coupled with. For example, an incubus coupled with a monster that lives in a desert, or near a volcanic crater, will gain resistance to heat, and an incubus that is coupled with a monster from a snowy country will gain resistance to cold. They gain such strong resistance that they can even actively have sex with monsters in such environments. To provide a remarkable example, due to a ritual performed by a Sea Bishop, there are incubi that became able to live underwater. This ritual is performed to quickly change someone into an incubus, so as a result of having been changed into an incubus with the demonic energy of the monsters of the sea, they've adapted to live underwater.
Since an incubus retains the demonic energy of the monster he's coupled with inside his body, a human woman who has sex with an incubus will end up transforming into that race. However, the lust of an incubus who's kept having sex with monsters will not be satisfied by having sex with anyone other than a monster.
Also, an incubus' superhuman lust is only directed towards the monster he's coupled with no matter what, and they don't have an instinct to attack the opposite sex like monsters do. For that reason, incubi do not attack and forcibly rape human women, and such an incident has never been confirmed.
A Kenkou-Approved Explanation of Monsterization/Corruption in MGE
The following is a KC-endorsed explanation as to how corruption and monsterization is actually meant to be understood in the MGE franchise:
Firstly, KC says that life after monsterization can be "However you want it, as long as it does not go against the spirit of MGE". Love conquers all and even without anything but love, you can still live. MGE is such escapist porn fantasy. It is not a work meant to make you suffer and in the end, everything will be settled at a good conclusion, as long as the setting permits it. And it is the main theme of MGE. From their first transformation, monsterization may make women lustful or loyal to their desire [TL Note: Assume this refers to their 'sexual desires'.], strengthening their instincts as Monsters, but it hardly changes the personality of the target.
Some may want to continue living a life where they can work, indulge in hobbies, explore cultures, go traveling/exploring, and partake in other various activities after the monsterization process. To this, MGE says yes. (This aspect can be seen in a handful of examples in the books. Following KC's original intentions, the priority of sex in their life will become nearly equal to that of having to eat a meal.) Some may choose to be completely free of life's duties and spend their remaining days indulging in sexual pleasures. To this, MGE also says yes. (This is a rare case, but can be quite an attractive choice for people who live in a country where working for 600 hours a month and dying of exhaustion is a real possibility.)
Some may feel a desire to release their violent urges and commit crimes like murder, theft, and other harmful acts. To this, MGE says no, definitely not. (In these people, Monsters will make the criminal indulge in their bodies so that their violent thoughts are overcome with love and lust. The priority shift of sex in their life is mostly intended to function in this way. It's not too different from any other case where a person's values are changed because of an experience they had. For example, our values/desires change when we eat a delicious dish for the first time [TL Note: I believe what he meant was that when you eat a new dish and find out you really like that taste, you're going to try have it again because it changed your desire for that particular food.]. And when we marry with a partner, the priorities of your life will definitely change.) So you'll still be free to live a 'normal' life after becoming a Monster or joining with a female monster but, sex will simply become a more raised priority in your life. This should still be acceptable for most be, right?
Additionally, we Japanese value the contexts of sentences more than what is written literally. We refer to this as called "言葉の綾 (kotoba no aya)". For example, if MGE says, "Men who have sex with Monsters begin to think of nothing but sex with them." the intention of the sentence was to describe how attractive the idea of having sex with Monsters has become. It doesn't mean that all of them LITERALLY become unable to think except for sex with Monsters.(But, if they really do want to think of nothing but sex with Monsters, then they are allowed to do that.) This seems to be one of the gaps in understanding that KC attempted to explain years ago. [TL Note: Back when MGE was becoming popular among Western audiences, there was a lot of confusion about things like the above. KC attempted to better explain the details to his Western fans but the endeavor ultimately ended in failure on both sides (This lead to some bitterness between KC and his Western fans but things have since returned to a more friendly state). As a result, the 'gaps' in comprehension of the story have continued to grow among Western followers as more and more information is posted without a proper explanation. The effects of these 'gaps' are very obvious among Western communities as almost all of them are plagued with constant bickering and arguments that don't have a clear answer. These disagreements have resulted in several other events happening among the Western audience but we'll save that for another time.]
Most Japanese fans understand KC's original intentions well, and understand that MGE is an ideal world that rejects all "bad endings" regardless of how they might happen. Of course, there are people who dislike MGE because they think of it as a dystopian world but usually people don't continue to hang around the stories and communities that they dislike, seeing as how that would be a complete waste of their time. Lastly, about 'corruption' elements within MGE: Originally, 'corruption' was a fetish that focused on brainwashing, mind breaking, netorare, etc. KC appreciates some elements of 'corruption' like changes in physical appearance and the adoption of a more seductive and (sexually) aggressive mindset, but dislikes the 'bad endings' that usually accompany these things. If he was a true disciple of the 'corruption' fetish, then the Fallen Maidens would massacre people cheerfully, physically hurt you, and have sex with the person who brainwashed them while forcing you to watch. Of course KC did not want this so he chose to remove brainwashing and soften the strength of the 'corruption' fetish within MGE.
Now, 'corrupted' girls focus on the feelings of desire and true love that they previously suppressed and their personalities are liberated rather than warped against their will. (Though, it should be noted they that do undergo mental changes when they go through monsterization like becoming much more lustful and having a greater sex drive. If MGE's detractors would call this brainwashing and hate it, then it can't be helped. [TL Note: By saying "it can't be helped" he means that that if people claim this is brainwashing and choose to hate it then let them hate it. As we'd say here in America, Fuck'em]).
Wilmarina is a special case. Not only her but all the other Fallen Maidens were described by KC as girls who couldn't be redeemed without giving up their humanity. She (Wilmarina) was bound by sense of duty to become an 'ideal hero' and as a result, felt guilty when she couldn't fit the role. She compensated by obsessively helping others and never taking a moment to enjoy some time for herself. This led to her being manipulated and used by people but after being turned into a Monster, she is free to follow her true nature. In this case, I think it's actually the Holy Church and her (Wilmaria) father that did the brainwashing. She had spent her entire life sacrificing every waking moment to helping others so to call her selfish for indulging in her true desires seems to be a mistake.