Weekend. A young office worker named ShinTarou lives with his wife in a certain place within the city. He is hurriedly tidying up the house to welcome his mother-in-law, who will soon arrive. His wife's mother, who lives in the countryside, is coming to visit her daughter and son-in-law, traveling far by train to Tokyo. Hearing the doorbell ring, ShinTarou involuntarily held his breath at the sight of his voluptuous mother-in-law, Shoda Chisato, entering the house.
