Yumi was living a jerky life with her son-in-law, Kenji. The cause was Yumi's plump body and big tits! Kenji in adolescence gets horny every time he sees Yumi, and every day he sinks his sexual desire with masturbation with Yumi as a side dish. However, Yumi finally sees masturbation. Far from being angry at the fall, Yumi pitied Kenji, who is a virgin and doesn't know a woman, and suggested that she should just rub it.
