Shinnin kyôshi: Nomotomiho: Chiniku no urajugyô(2003)

Shining Teacher: Miho's Secret Lesson is a Japanese adult film following Kinko Shimazaki, a new English instructor at Yugiri High School. When rebellious student Kazuko Okawa openly flaunts SM magazines in class, Kinko confiscates the material and slaps the girl—an act that triggers unexpected consequences. Kinko's fiancé Kawamura, a senior teacher, takes her to an underground SM club in Roppongi to explain the situation: Kazuko's wealthy father has donated heavily to the school and maintains political connections, making her untouchable. Desperate to restore order and morality to the institution, Kinko must navigate a corrupt system where money and influence shield students from accountability. The film explores themes of institutional corruption, moral compromise, and one teacher's struggle against entrenched power.