Kasumi and her husband have been married for 27 years. Their life together has been satisfying in nearly every way, except for one thing—their sex life. Over the years, Kasumi's libido has steadily increased, but her husband has become unable to satisfy her. Last night, when she tried to get intimate, he rejected her, and lately she's grown accustomed to masturbating after her husband and son leave the house. One morning, while visiting her son's room, she noticed he had an erection while sleeping—so tempting she almost reached out to touch him. That night, her husband received a stamina-enhancing drug from a friend, allowing them to have sex for the first time in a while. But when she begged for another round, he refused once again. In the end, Kasumi had no choice but to turn to her son. She pleaded with him, "I want you to make love to me..."