A young wife seduces a younger man with a submissive nature, and is subjected to reverse training by her perverted husband, eventually falling in love with anal play and transforming into a slut. (Ciri MGMQ-168)

Rei, a teacher at a boys' school, is influenced by her sadistic husband whom she married several years ago. She discovers that bringing men to orgasm through anal stimulation brings her immense pleasure. Therefore, every night she engages in reverse anal sex with her masochistic husband using a peniboon, driving him to madness. One day, Rei encounters a male student at school who also has a masochistic streak, igniting her inner fanatic. She first teaches him the secrets of anal pleasure on the bed in the infirmary, then invites him to her home, where she lets him utterly succumb to the degrading pleasure of reverse anal sex…