Just remarried, Sumire (Kurokawa Sumire) is neglected by her husband who is constantly on business trips. Furthermore, she cannot get along with her stepson Akira, and feels lonely both physically and mentally. At the time when her body ache reaches its limit, Akira confesses his long-standing love to her. 'I just want to comfort you, Sumire, while my father is not around.' Sumire decides to accept Akira, with a deadline until her husband returns. However, the intense, relentless piston attack shakes Sumire's heart...
