When her daughter Riko introduces her boyfriend to her mother Keiko, she greets him in high spirits... but it turns out to be Katsumi, her sex friend whom she met at a cooking class! Feeling that fate has played a part in this ironic encounter, Keiko sneaks out of her daughter's sight to play with him and enjoys his young, strong cock... Katsumi ends up staying the night, but carnal desires are such that Keiko can't pass up the opportunity and she sneaks into his bedroom. Even though he knows it's wrong, Katsumi is at the mercy of Keiko's incredible technique and gives in to his desire to have sex with her...