Meme is the irresponsible daughter of a powerful summoner clan in the demon world, and her father sends her to the human realm to learn independence. Needing somewhere to live, she meets Sentarou Narigane, the wealthy but chronically bored landlord of Kuroyuri Apartments. He offers Meme a room for free on one condition: her supernatural presence must make his life less dull, turning a punishment assignment into an unusual arrangement between a demon-world dropout and a landlord desperate for excitement.