Yoshio lives with his father's new wife. His father is away on business. Yoshio, who secretly has feelings for his stepmother, Nozomi, can't help but caress her body when he sees her defenseless while she takes a nap. Excited by the caresses, the young Nozomi comforts her heated body and indulges in fantasies. Yoshio can't resist witnessing her masturbating and approaches his mother...