Weekend. A young salaryman living with his wife in a certain place in Tokyo was hurriedly tidying up the house to welcome his mother-in-law, who was about to visit. His wife's mother, living in the countryside, had taken a long train ride to come to the capital to see her daughter and son-in-law. Hearing the doorbell ring, he held his breath at the sight of his voluptuous mother-in-law, Kyōen Yuriko, who was about to enter the house.
