Groper Pervert Train (1985)

Yuko, a female college student, is interested in the exposé articles in photo weekly magazines and secretly waits for an opportunity to get a scoop herself. One day, Yuko witnesses her friend Akiko being molested on the train. However, rather than helping Akiko, Yuko sees this as an opportunity and starts recording it on tape. However, the hand of evil is approaching Yuko, who is fascinated by the charm of the molestation scene...