Six years after marrying Mariko and Jo, the couple enjoys financial stability, but Mariko gradually grows dissatisfied with Jo's lackluster sex life. Whenever she initiates intimacy, his response is minimal, causing her pent-up sexual frustration to intensify daily. One day, her part-time boss sees through her unhappiness and takes advantage of her vulnerability, forcing himself on her. Emotionally and physically wounded, Mariko silently reaches out to her husband for help she can't put into words. Sensing her pain, Jo begins to change his attitude, and their relationship starts evolving in a new direction.