Yukari is deeply concerned that her son's friend, Tomoma, shows no interest in the opposite sex. Even when approached by younger men, he remains unresponsive, instead becoming absorbed in masturbation. One day, she catches him secretly watching her during a private moment. Realizing he actually is interested in women, she's shocked to discover he had been lying about his lack of attraction. Determined to uncover his true reasons and help Tomoma gain confidence in pursuing relationships with women, Yukari decides to take matters into her own hands.