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 traffic accident at a young age. She was taken in by her mother's brother and his wife to live together. At first, the couple was kind. However, her stepfather's gaze began to change. 'It's bad that you look like Mom.' Rion ended up having a relationship with her stepfather. Her stepmother had noticed. From then on, the family dynamics changed. Rion became an outlet for their stress. However, Rion started to crave this 'punishment' game at some point...