カマキリ娘

An insect monster strongly resembling a praying mantis. A carnivorous monster that eats not only other monsters, but human beings as well. Their favorite food however is male semen, and will both use them for reproduction and feeding. Due to their unique insect based vagina, any male caught by them will be enraptured in the unique sensations. After forcing her prey to multiple ejaculations and weakening them, they will then usually eat their mate. However when the mantis chooses a mate for reproductive purposes, she won't eat them. After she has been inseminated, she will lay her eggs on the male's body. The eggs will in turn stimulate the man, forcing him to multiple ejaculations, providing nourishment for the newborns. Like this, the male is used as a tool for reproduction all the way until their birth. Once captured, the male will be kept as a reproductive tool for the rest of his life. [From In-game Monsterpedia]