One night while her son is away on a business trip, she is seduced by his young wife...? "The night I was seduced by my stepdaughter." When the father calls out to his daughter who came home in the morning, the daughter shows a frightened expression...? "My pussy is my father's." Her mother's remarried husband is a perverted father who even peeks into the bath. The daughter is also cunning, and she proposes a deal to her father, saying that she can't stand being seen for free, but the situation takes an unexpected turn...? "I'll sell my underwear to my father!" The third installment of the unusual relationship between a father-in-law and daughter appears!