Ryoko is a full-time housewife busy with housework. Her only son appears and starts playing with her crotch. He plays with her body even while she is talking to her husband on the phone. When her husband comes home and goes into the bathroom, her son takes her and pushes his dick deep into her throat through the door. Sensing her husband's presence, her mother becomes confused when he speaks to her, and her son grabs her head and shakes his hips back and forth, showing signs of confusion. After putting her husband to sleep with sleeping pills, her son rapes her again. Her body is covered in obscene graffiti, a nose hook is fitted, and she is treated as a sex slave.