Yukari's problem was that her son, Tomoma, had no interest in the opposite sex. A young man tried to seduce him, but it had no effect and instead made Yukari aroused, leading her to masturbate. However, during the act, Yukari noticed Tomoma peeking. Feeling happy that he had an interest in the opposite sex, she asked him why he lied about having no interest... Upon learning the truth, Yukari decided to do something to help Tomoma gain confidence in relationships with the opposite sex.
