Kanna is an erotic novelist who hides from her husband, and her mom friend Yuri. One day, while having a tea party as usual, the topic turns to sex. Yuri seems to be living a fulfilling sex life with a boy she met on an app, and she half-forcefully recommends the app to the shy Kanna, saying it's to "find material for a novel"... Kanna then starts using the app and meets Taichi, a student who is obedient, honest and cute. Kanna awakens to the pleasure of dominating younger men, and gradually becomes immersed in her relationship with them.