Atsushi gets his part-time job pay and decides to go to a brothel for the first time in a while. Since he's going anyway, he chooses a mature soapland that he's never been to before. He chooses the number one soapland girl and waits in the waiting room, but it's actually his real mother, Hisayo! He tries to leave the store in a hurry, but she stops him, saying, "I have pride as number one too!" and the forbidden soapland play begins...