Other name: 恶之教典; 悪の教典; Lesson of the Evil
Summary: Hasumi Seiji, who teaches English at a high school, is affectionately known as "Hasumin" by his students. Hes popular, good-looking, kind to everyone, and efficient at teaching and solving problems. But no one knows that hes actually a manipulative serial murderer. He treats the school as a kingdom he rules. He manipulates others into trusting him and obeying him. But when there are people (students, teachers and parents alike) who cannot be reformed, he kills them off without mercy. Eventually, his targets include all the students in his class...