Nene, a full-time housewife who lives with her husband and her husband's father, is a hard worker who does her housework every day. One day, while Nene is taking a shower, her father-in-law suddenly enters the bathroom and sexually harasses her. The next day, her father-in- Nene attacks Nene while her husband is taking his usual short 15-minute bath. Unable to resist, she is held in various positions and gradually her body is trained to be sensitive to her husband's father's penis, not her husband's.