Isekaied in Monster Girl Encyclopeadia!

You wake up in a world filled with Monster Girls, a type of monster that comes in a massive variety of shapes, sizes, and dispositions, but are united with their overwhelming love of sex, with supernaturally-beautiful bodies and incredible abilities to give pleasure to make sure they get it.

Decried by humanity as the enemy of mankind for as long as they've been around - monster girls' inhuman looks and questionable dating practices mean they really are viewed with dread by most of the humans of the world, even though for the most part, their intentions aren't any more sinister than giving the men they capture a really, really good time. Of course, human women still exist too, which is why men don't always leave society for them.

The monster girls were created as magical hybrids, combining the traditional blood-drinking, skull-crushing monsters of the previous with the sultry, seductive, and sexy succubus race. What popped out the end were creatures that still walk on eight dagger-tipped legs or a million writhing tentacles, but at the same time have rockin' tits and a literally irresistible sexuality. Their monster heritage endows them with superhuman strength and an instinctive urge towards wanton mating, but it also means they have great difficulty with the word "no" - meaning that encounters with human males regularly end in hot, sticky reverse rape.

The habitats of monster girls are as varied as their forms. Some remain in the haunting grounds of their monstrous predecessors: barren wastelands, deep forests, and spooky graveyards. Others make their homes deep under the sea or high on the mountaintops. But, once the monsters were gifted sexy forms and divested of their propensity to murder everything they set their eyes on, inevitably there are many humans who are happy to live alongside them in mixed communities. Here, monster girls are generally more placid, and prove enthusiastic workers in various roles.

As the above suggests, not all monsters are violent in their endless pursuit of coitus; different species' behaviors run the whole gamut from one-sided violation, through equitable human-style courtship, all the way to enticing men to rape them. Still, whatever method they use, if a monster girl is interested in you, you are unlikely to come out of the encounter with your pants intact. Not even gender will necessarily save you - many monsters may ravish human women under certain circumstances (usually for the sake of monsterization). Exploring the many ways monsters now interact with humans is one of the main themes of the encyclopedia.

In certain lands, there are marketplaces and auction houses where monsters that were defeated and captured by humans are sold as slaves. However, the operations are actually manipulated by monsters themselves; the 'slaves' deliberately lost to humans and let themselves be captured in order to have a man take care of them. Even the winning bidders are being completely manipulated, so that the monsters can choose their own master.

Like all lifeforms, monsters have a limit to their abilities and the amount of mana they can possess, depending on race. However, the “limit” is easily removed by repeatedly obtaining a man's essence.

Diseases that afflict humans mostly don't afflict mamono. However, there are some peculiar illnesses that only afflict monsters. All of such illnesses have aphrodisiac effects.

Biologically, monster girls are half-humans and capable of digesting the same food edible by humans. Herbivore monsters can eat meat, while werewolves and werecats can eat onions, despite that they are toxic to cats and dogs. Since genetics of monster girls and humans are very different, reproduction between humans and monster girls does not have enough genetic information from the parents, the missing genetic information being compensated by Mamono Mana linked to the Mamono Lord instead. This also prevents the risk of a defective baby from couples sharing common problematic genes[5].

And by your side, is an Encyclopeadia, with all the info about each type of monster girl from far and wide, including their habitat, nature, diet, and a fairly long overall description of them, which may include personality, history, abilities, appearance, and so on.

At present, due to the influence of the current mamono 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.