Five boys newly enrolled in a formerly all-girls school, already having difficulty connecting with the girl students, run afoul of the school’s "Underground Student Council" and face strict disciplinary measures.

Shingo, on furlough from the prison, meets a girl named Anzu at the arcade in town. When Gakuto turns to his Guan Yu figurine for guidance, the tip of his sword falls off, starting a chain of events with momentous consequences.