(I still can't forget what happened that day.) Well, on that day my father was absent from the business trip. Kenji, a son who was asked to bring soap to her by her mother Fumiko, who was taking a bath, saw her naked since she was a child. "Oh, what are you thinking?" Monko teased Kenji with a nice tent between her crotch, but that night... Kenji is obsessed with masturbation as if imagining her mother's kindness.