Kekko KamenKekko Kamen.

Kekko Kamen (Japanese: けっこう仮面, Hepburn: Kekkō Kamen) is a Japanese manga series written and illustrated by Go Nagai. It was serialized in Monthly Shōnen Jump from September 1974 to February 1978, with the chapters collected into five tankōbon volumes by Shueisha. It follows the misadventures of a student named Mayumi Takahashi who attends a boarding school called Sparta Academy that is run by sadistic psychopaths.