When her husband is hospitalized, Natsuki has to live alone for a while. Worried about Natsuki, her daughter and son-in-law move in with her. However, there is a serious misunderstanding between the newly married couple. Sexual activity between the couple has decreased, and the son-in-law feels lonely, while the daughter is exhausted from taking care of her parents. The misunderstanding leads to a heated argument. Natsuki tries to comfort her grieving son-in-law, but she never expected that his excess sexual desire would be directed towards Natsuki...