Rin, a housewife, leaves home after a fight with her husband and takes refuge at her acquaintance Chihiro's place. One day, Rin witnesses Chihiro cheating on her husband. Despite being married herself, Rin feels deeply affected by Chihiro's liberated lifestyle. That night in the bath, she recalls the scene, scolds herself, and indulges in masturbation. Chihiro then leaves town for a secret trip with her lover, leaving Rin alone to manage the household. As time passes, Rin becomes increasingly aware of the pent-up sexual desires held by Chihiro's son and husband.