demoted to a teacher the strongest sage raises an unbeatable class

monsters have long threatened humanity’s existence. to fight against these beings, keith, the youngest person to ever become a sage, joins a knight order and shows immense success on the battlefield. however, that doesn’t last long, as a quarrel with an incompetent higher-up gets him fired from the order. with nowhere to go, keith is assigned as a teacher, and with his talent for bringing out the best in his students, his class is about to reach unbelievable heights…