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! Hapless human twenty-something Kurusu Kimihito becomes an involuntary 'volunteer' in the government homestay program for monster girls when a reptilian lamia named Miia is sent to live with him, followed by a buxom centaur named Centorea and a scantily clad harpy named Papi!