On a matching app invited by a mom friend, he gently tames his "younger younger" together.

I think he's Rinko, a close mom friend. One day, the conversation turned to sex life, as he was holding a tea party as usual. Kana seems to have had a fulfilling sex experience with young boys he met through the app, and Rinko, whom he thought was shady, starts the app as she says, ``If it's just one time''... Ryu, a student he meets through the app, and Rinko awakens to the pleasure of being obedient and domination. And Ryu also drowns both her mind and body by the seductiveness and sexuality of a married woman.