You are reading The Devil in School manga, one of the most popular manga covering in Mature, Drama, School life genres, written by at MangaBuddy, a top manga site to offering for free. The Devil in School has 42 translated chapters and translations of other chapters are in progress. Lets enjoy. If you want to get the updates about latest chapters, lets create an account and add The Devil in School to your bookmark. Kasai Koharu, a beautiful girl with an exceptional sense of style, is assigned as the new replacement teacher after the main high school instructor was hospitalized due to relentless bullying from the students.Though she appears airheaded and constantly wears a bright smile, the students continue to mistreat her, unaware of the dark secret that their teacher, Kasai-sensei, is a real psychopath."The reason I became a teacher is to bring happiness to my students."