Celebrating the Debut of Yuko Shiraki's First Takara Eizou Film! Yuko, widowed young, has been living with her daughter and son-in-law. She gets along well with her son-in-law, Hiroki, and they lead a simple but happy life. One day, Yuko witnesses her daughter and Hiroki arguing about sex. It seems her daughter is uncomfortable with intimacy, repeatedly rejecting Hiroki's advances. Concerned, Yuko tries to talk to her daughter, but she won't listen. Then, by chance, Yuko catches Hiroki masturbating. Startled and flustered, Yuko takes an unexpected action. "My daughter's responsibility is also mine as her mother..." she says, taking Hiroki's hand. What starts as just hand-jobbing soon escalates to fellatio, and then even sex! Despite Yuko's desperate resistance, Hiroki can't stop.