Glenn Redas, a part-time lecturer at the Arzano Empire Magic Academy, is a habitual offender who dozes off under the guise of self-study. Even when he is on the podium, he only uses tricks like nailing textbooks directly to the blackboard, and his tricks are so bad that even students don't care. The student who was annoyed by Glenn, Sistina Feiberu, who was known as the "teacher's worry", challenged him to a duel. Unfortunately, Glenn was defeated by a huge margin... However, an unprecedented terrorist incident occurred in the school, and all students were affected. "Don't hurt my students!" Glenn said so and showed his true ability at this time!