After losing his parents in middle school, Inaba Yuushi moves in with distant relatives who make him feel like a burden. Desperate to escape their home, he plans to attend a high school with a dormitory, only to have his dreams shattered when the dorm burns down. Facing the challenge of finding affordable housing, Yuushi stumbles upon a too-good-to-be-true room in an old building that turns out to be a Monster House, a unique residence for humans and supernatural beings like ghosts and mononoke. Living among these creatures is Akine, a fearless girl with the ability to banish evil spirits. Yuushi's high school experience takes an unexpected turn as he navigates this bizarre new living arrangement.