ONEZ-179 A daughter named Izumi Rion is molested by her stepmother and stepfather in a love hotel on graduation day.

Rion lost her parents in a car accident when she was young. To be taken over by her mother's brother and his wife and live together. They were kind at first. But the father-in-law's eyes changed. "It's bad that you look like Mama." Rion has an affair with his father-in-law. Her mother-in-law sensed it. Since then, family relationships have changed. Rion is used as an outlet for stress. However, at some point, Rion began to ask for it. For a game of punishment...