Ryo and Kaho are good mom friends. One day, while having a tea party as usual, the topic turns to sex life. Kaho seems to be having a fulfilling sex with a young man she met on the app, and even Ryo, who thinks it's questionable, starts the app as she is told ``If it's just one time''. Yuzuru, a student who got acquainted with the app, wakes up to the pleasure of being obedient and dominating. And Yuzuru is also drowning in the bewitching and sexy attacks of married women, both in mind and body.