Kaoru lives with her husband after their daughter got married. She and her husband love each other, but they have been experiencing some intimacy issues lately. Their daughter and son-in-law invited them over to celebrate buying a house. Kaoru and her husband were happy for the young couple's new home. Late at night, Kaoru happened to witness something private involving her son-in-law that made her feel conflicted emotions. The next day, Kaoru's husband and daughter went out, leaving her alone with her son-in-law. Kaoru found herself in an ethically questionable situation regarding her son-in-law while he was sleeping.