One day, Ryoko's nephew Shigeru came to stay at her house. When she asked him if he had a girlfriend, he replied that he was so busy preparing for his entrance exams that he didn't even have time for masturbation, let alone a girlfriend. Touched by his innocence, Ryoko kindly approached him and began masturbating in front of Shigeru. Then, guiding his hand to her wet lower body, she deepened their relationship.