Kanna secretly writes erotic novels, while her mom friend Yuri has been enjoying an active sex life with someone she met through an app. During their usual tea gathering, the conversation turns to sex, and Yuri practically forces the shy Kanna to join under the excuse of researching material for her novels. There she meets Taichi, a sweet, obedient adult college student. Kanna awakens to the thrill of controlling a younger man and gradually loses herself in their relationship, with Yuri joining her in taming their favorite match.