Momochi-san Chi no Ayakashi Ouji

On her sixteenth birthday, Himari Momochi inherits the house her late parents secretly left behind. Hoping the estate might give her some connection to the family she lost, she arrives to find three young men already living there: Aoi Nanamori, Yukari, and Ise. They warn her not to stay because the house stands on the boundary between the human and spirit worlds, allowing dangerous ayakashi to pass through.

Himari refuses to abandon the only place that still connects her to her parents, then learns that Aoi became the house’s guardian without choosing the role and has been completely forgotten by the outside world. With every spirit that enters the estate and every secret revealed about Aoi’s past, Himari’s determination to live there becomes something more: a promise to help him reclaim the life the house took away.