Yumeno Kyusaku's Girl Hell
Utae and Aiko attend an all-girl private school where the devoutly religious principal seems to be raping some of the students, including Utae. Aiko is really the principal’s daughter, and was horribly abused by him when she was a child. Or so the audience is led to believe. Eventually, Utae and Aiko kidnap the lecher and viciously torture him in scenes so diabolically Sadean that they could only have come from the pen of Kyusaku Yumeno, author of the well-regarded DOGRA MAGRA.