Yuna lives happily with her husband Ryo, who is significantly older than her. Their days are peaceful, but Yuna gradually grows dissatisfied as their sex life begins to fade. One night, when she initiates intimacy, Ryo coldly rejects her. Provoked by his dismissive attitude, Ryo—his pride wounded—becomes aroused and forcefully makes Yuna take his cock into her mouth, roughly dominating her body. For the first time, being commanded by her husband, Yuna discovers pleasure in submission. From then on, she continues to obey Ryo's demands, finding increasing arousal in complete obedience.