Rei, the daughter of a fatherless family, lost her mother when she was young. But her father travels a lot and lives almost alone. Such a Rei was a quiet and honorable female student, but she has a delusional habit, and she imagines that she will be overwhelmed by old men every day, and she indulges in masturbation. One day, she is attacked by a man in her neighborhood, Masakazu, who brought a circular, and has sex with her. As a result, Ippei, who is Masakazu's older brother, and Ippei's friend, middle-aged delinquent Hito, also take notice of him.
