Reika, who is dissatisfied with her husband for not wanting to have sex at all, is caught by her truant son while masturbating with an eggplant in the kitchen. Aroused, Satoshi tries to get his mother's attention by stealing money from a chest of drawers and exposing his erect penis to his scolding mother. "You haven't been doing it with dad, right? Mom" The son attacks his real mother and rapes her with a bag. Once the relationship has begun, the mother starts to seek out her son's penis on her own, and she goes alone to her son's apartment who left home due to a quarrel with his father...
