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weekend. Shintaro, a hard-working young office worker who lives with his wife somewhere in Tokyo, hastily cleaned up the house in order to welcome his wife's mother, who will soon be visiting. The wife's mother, who lives in the countryside, travels a long way to Tokyo by train to see how her daughter and her husband are doing. Hearing the sound of the door chime, the son-in-law couldn't help but gasp at the voluptuous swelling of the female body of his mother-in-law who came to Tokyo shortly after.