Miho and Hinami are close mommy friends. One day, while having their usual tea party, the conversation turns to sex. Hinami seems to be having fulfilling sex with a young man she met through an app, and even though Miho initially thought it was shady, she ends up starting the app herself, thinking, "Just once won't hurt." Miho meets a student named Yui through the app, and she awakens to the pleasure of dominance as Yui proves to be obedient. Meanwhile, Yui is also captivated by Miho's alluring charm and relentless sexual advances, both mentally and physically.
