Atsushi decided to go to a soapland for the first time in a while after receiving his part-time job pay. Since he was going, he chose a soapland with experienced women that he had never been to before. He ordered the Number One bubble princess and was waiting in the reception room when, to his surprise, his real mother, Hisayo, appeared! He tried to hurriedly leave the store, but she firmly stopped him, saying, 'I also have pride as the Number One!' Thus, the forbidden soap play began...
