The moment KANBi exclusive actress Origasa Rumi awakens to a new pleasure... Her nighttime activities are a worry in her happy newlywed life with her husband, who is much older than her. Perhaps due to age, her husband's penis becomes limp easily, and she feels unsatisfied both physically and mentally. One day, she finds a gorgeous pair of underwear lying around in her room. The next moment, she happily puts it on, thinking it's a gift from her husband, her husband's stepson, Shinya, suddenly arrives in the room and sees her, revealing that the underwear belongs to him. Even as she resists his violent, unresisting actions, her husband's erect penis, incomparably more brave than her husband's, reminds her of the joys of being a woman she had almost forgotten. From that day on, a twisted love triangle is formed, and a new, immoral life of sex begins...