Kekkou Kamen

Mayumi Takahashi, a first-year student, attends Sparta Academy, a junior high school where any student (typically a girl) making even the slightest mistake will be subjected to sexual humiliation by the perverted, dishonest, and misogynistic teachers running the school, with the principal being a demonic villain known as "Toenail of Satan." Before the teachers can go too far with their advances, Kekko Kamen intervenes and gives them a good pounding. She then typically does a finishing move in which she leaps into the air and lands crotch-first on her opponent's face.