What do world governments do when they learn that fantastical beings are not merely fiction, but flesh and blood - not to mention feather, hoof, and fang? Why, they create new regulations, of course! When hapless human Kurusu Kimihito becomes an involuntary volunteer in the government homestay program for monster girls, a reptilian lamia named Miia is sent to live with him. While cold-blooded Miia is so sexy she makes Kimihito's blood boil with desire, the penalties for interspecies breeding are dire. Even worse, when a buxom centaur girl named Centorea and a scantily clad harpy named Papi move into Kimihito's house, what's a full-blooded young man with raging hormones to do?