Monsters—they're real, and they want to date us!
Three years ago, the world learned that harpies, centaurs, catgirls, and all manners of fabulous creatures are not merely fiction; they are flesh and blood—not to mention scale, feather, horn, and fang. Thanks to the "Cultural Exchange Between Species Act," these once-mythical creatures have assimilated into society, or at least, they're trying.
When a hapless human named Kimihito Kurusu 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, and it is Kimihito's job to take care of her and make sure she integrates into his everyday life. Unfortunately for Kimihito, Miia is undeniably sexy, and the law against interspecies breeding is very strict. Even worse, when a ravishing centaur girl and a flirtatious harpy move in, what's a full-blooded young man with raging hormones to do?!
The Cultural Exchange Between Species Bill is government legislation passed three years prior to the events of Everyday Life with Monster Girls, condoning the cultural exchange between humans and non-human liminal species, or extra-species.