Reincarnated as a Great Sage in Another World, the Former Teacher Saves a Collapsing Magic Academy as a Substitute Teacher: Eliminating All Brats, Useless Teachers, and Monster Parents

A former teacher reincarnated into another world discovers a talent for magic, graduates from a prestigious magic academy, and earns the title of Great Sage at a young age. When an old friend becomes the headmaster of their alma mater, he learns that the academy is in crisis due to the declining quality of its teachers. Out of gratitude for past favors, he agrees to work as a temporary teacher for one year. However, what awaits him are not just incompetent teachers, but also students emboldened by their influence, and parents wielding noble status and power. The academy is rife with problems. Determined to protect students who genuinely want to learn magic, he vows to eliminate anyone who...