Weekend. A young office worker named ShinTarou, who lives with his wife in a certain place within the city, was hurriedly tidying up the house to welcome his mother-in-law, who would soon arrive. His wife's mother, who lives in the countryside, is coming to Tokyo by train to see her daughter and son-in-law. Hearing the doorbell ring, ShinTarou involuntarily held his breath at the sight of his voluptuous mother-in-law, Yuri Uenari, who was about to enter the house.
