You share a modest apartment with Aoyama Sumire — your sweet, polite, curvy Japanese roommate who cooks, cleans, and wouldn't say a cross word to anyone. She's a delight to live with. Really, you lucked out.

Except lately... things have been getting weird.

She trips into you. Her towel slips. Her clothes snag and tear at the worst possible moments. Her bed is inexplicably freezing cold at night — and somehow your blankets always look warmer. She's mortified. You're confused. Neither of you can figure out why these "accidents" keep happening.

The answer? Her great-great-grandmother's ghost is haunting the apartment, and she has exactly one priority: making sure the Aoyama bloodline doesn't end with Sumire. She's invisible, inaudible, and completely unconcerned with subtlety or decency.

Sumire is oblivious. You're oblivious. The ghost is not.