Sakurakama, a slightly strange land where cherry blossoms bloom in every season. Two girls, Mashiro Aoi and Kirei Yamabuki, raised and nurtured by the “Eternal Cherry Blossoms.” As best friends and family, their peaceful days spent supporting each other from childhood are transformed by a trivial incident.

"Was it you who awakened me from my emptiness?"

A forbidden cursed object. "To release it into this world is to invite disaster." So it is written in the records of a certain family, something that has been kept secret. A terrible thing. And a pitiful thing. That thing is called "Tosa Maru."

This is the story of a cursed object and two girls woven together in a corner of this town where cherry blossoms forever dance.