A mother named Hikari, who has larger breasts and is more beautiful than her daughter, decided to live with her daughter's family. Hikari always stays by their side taking care of them, but the son-in-law, Yuuta, is so captivated by Hikari's allure that he has lost interest in having children. One night, as Yuuta was about to go to the bathroom, he heard lewd noises coming from the bath area. Peeking slowly, he saw Hikari pleasuring herself. Excited, Yuuta watches Hikari's seductive body and begins to harbor a certain desire...
