While her husband is away, a fateful night occurs with her father-in-law. Satomi, the wife who can't forget this encounter, finds her destiny intertwined with it... Due to renovations at her parents' home, her father-in-law comes to the city, but his schedule overlaps with her husband's business trip, leaving Satomi to live alone with him. Despite her unease, a peaceful daily routine ensues. However, one drunken night, she's taken by surprise by her father-in-law. Even after her husband returns from his trip, her heart remains troubled because she can't shake off the memory of that night with her father-in-law...