In this adult school role-play, Yuno and Momo are best friends who share everything—or so Yuno thinks, until she learns Momo has secretly started dating Kenichi. Angry about being kept in the dark, Yuno approaches him for a little revenge and begins secretly giving him blowjobs. She enjoys their hidden arrangement so much that she becomes his oral sex friend, sucking him and having sex with him all over the school behind Momo's back. What began as teasing oral play soon becomes undeniable cheating and a sweetly sadistic NTR game.