No one expected the government to suddenly acknowledge the existence of demi-human species like harpies and centaurs, but when a careless Integration Agent shows up on Kimihito Kurusu's doorstep with an attractive Lamia in tow, he suddenly finds himself designated as a "Host Family". This might not be so bad, except that while Miia's top half is all girl and quickly develops a crush on her new human host, her snakelike bottom half makes that crush literal with a tendency to squeeze the life out of him! Plus, there's also the little problem that it's illegal for humans and non-humans to have THOSE kinds of relationships. With woman-in-black Agent Smith always sniffing about for improprieties, things only get more hectic in the Kurusu household when bird-brained Papi the harpy and master-seeking centaur Centorea need places to roost and stable. As the house gets crowded with even more captivating cuties, can any human male survive under such tempestuous and tempting conditions?