Fumika lives with her mother and stepfather. While living together, her stepfather sees something his daughter shouldn't see, which makes him fantasize, excited, and lustful. Reaching his limit, the stepfather approaches Fumika in the bathroom, out of his wife's sight. He touches her in an attempt to get her to get along with him, even though she is reluctant, and finally rapes her. However, the daughter feels the pleasure of having sex with her stepfather.