Kasumi Shirakawa and her husband have been married for 27 years. Their life was satisfying except for one thing. That one thing was their nighttime life. Year after year, Kasumi felt like her libido was becoming uncontrollable. She begged her husband last night, but he refused, and recently, masturbating after her husband and son went out had become her daily routine. One morning, she entered the room to wake up her son. When her son rolled over, his crotch was erect, and she almost reached out to him. That night, her husband seemed to have received a stamina-boosting drug from an acquaintance and they had sex for the first time in a long time. She asks her husband to do it again the next day, but he refuses. After that, she steels herself and asks her son, "I want you to hold me..."