オナニーマスター黒沢

Kakeru Kurosawa is a withdrawn junior-high student who keeps to himself and quietly judges his classmates, while indulging a secret habit in an unused girls' bathroom after school. The timid Aya Kitahara catches him there and blackmails him into taking revenge on the two popular classmates who torment her. What starts as a crude bargain pulls Kakeru out of his isolation and into the consequences of the punishments he hands out.