The beautiful and busty Mio secretly starts working at a soapland in order to send her son Tatsuya to a good university. Her beauty, aggressive kissing, and slippery mat play using her voluptuous body gain her a reputation, and before she knows it, Mio has become the most popular soapland girl, Yuria. One day, as she enters the waiting room as usual to welcome a customer, she finds Tatsuya waiting for her, looking nervous...