Monsters. They're real, and they want to date us! Thanks to the "Cultural Exchange Between Species Act," once-mythical creatures have assimilated into society, or at least, they're trying. When a hapless human teenager named Kurusu Kimihito is inducted as a "volunteer" into the government exchange program, his world is turned upside down. A snake-like lamia named Miia comes to live with him. Unfortunately for Kurusu, Miia is undeniably sexy and, even worse, when a ravishing centaur girl and a flirtatious harpy move in, what's a full-blooded teenage human with raging hormones to do?