I have a tutorial class in the magic world

Charlie Dior, the most outstanding magic genius in Auckland, helped the empire expand its territory and made great contributions. The emperor was afraid that his contribution was too high and had the idea of seizing power, so he designed to kill him Charlie Dior, who was reborn into another magical world, learned the lessons of his previous life and sincerely regretted participating in the war. In this life, he decided to be a teacher, teach and spread peace.