Izumi was masturbating while looking at an obscene book. Suddenly, her son came home and Izumi panicked, so she decided to hide in the closet. However, her son started masturbating right next to her. Unable to get out, she quietly opened the sliding door and her son's powerful penis jumped into her eyes. Frustrated by her aging husband, Izumi found herself reaching for her wet crotch... She became so engrossed that she lost herself, and her son found her. Unable to make any excuses, Izumi confided her lonely feelings to her son.