Yuriko, a fifty-something mother with a beautiful and refined face and ample breasts, was a woman of strong sexual desire. Despite her son's friend staying over, she indulged in her daily masturbation routine. Yukiō, her son, let his friend Akira peek at her lewd behavior and even engaged in obscene acts with his mother, showing it all to Akira. Driven by intense lust for the taboo relationship between mother and son, Akira confesses his feelings to Yuriko when Yukiō is away. The mother's sexual desire rages as she allows a young cock to pleasure her mature body.
