She inherited a mysterious house—but its supernatural residents may be hiding the biggest secret of all.

On her sixteenth birthday, orphan Himari Momochi inherits an old family estate she's never seen. But Momochi House isn't an ordinary home—it's built on the boundary between the human and spirit worlds, and Himari is supposed to serve as its guardian. When she arrives, she discovers three handsome young men already living there, including Aoi, a mysterious boy who seems to have taken over the guardian's role.

As Himari learns more about the supernatural world surrounding her new home, she becomes tangled up in spirits, curses, dangerous ayakashi, and the secrets surrounding Aoi's mysterious past. With a mix of supernatural adventure, romance, comedy, and family drama, The Demon Prince of Momochi House is a charming shojo fantasy about finding a home—and the people who make it one.