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! The Interspecies Cultural Exchange Accord ensures that these once-mythical creatures assimilate into human society - or else! When hapless human twenty-something Kurusu Kimihito becomes an involuntary volunteer in the government homestay program for monster girls, his world is turned upside down. A reptilian lamia named Miia is sent to live with him. 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?