After losing her husband, she was living with her daughter and her husband. Her daughter was pregnant with a 5-month-old baby, and she was eagerly awaiting its birth. Naturally, she assumed that her daughter's husband, Wataru, felt the same way... But one day, when she got out of the bath, Wataru was standing there holding her underwear. Wataru panicked and ran away, but was aroused by the fact that a man had seen her naked. And then Wataru came over to her...