Living in her dream home with her husband Hiroyuki and his father Tohru, Aoi spends most days alone with her father-in-law while her husband is away at work. Initially nervous, she gradually grows accustomed to their daily routine together. But one day, Tohru's gaze begins to change—intensifying in a way that deeply unsettles Aoi. That lingering look soon turns into action, and during one of their private moments at home, Tohru strips away Aoi's clothes and takes her. Now forced to confront the reality of spending every day alone with her father-in-law, Aoi must grapple with her feelings and the escalating situation. How will she face what lies ahead?