Hikari, a mother in her fifties whose body is ripe, has accumulated sexual frustration to the point that she is attracted to her son Koichi's body. She masturbates every afternoon... One day, Hikari is approached by Ito, a sexy salesman who comes to sell adult toys, and ends up having sex with him, having sex with him, his thick dick shoved deep inside her! Hikari's sagging breasts shake as she orgasms, and her lewd desires are aroused even more...