Oritsu Majutsu Gakuin no Kichiku Koushi

At first glance, Setsuna appears to be the worst kind of instructor the Royal Academy of Magic has ever employed. A part-time lecturer who cannot even cast a single spell, he spends his classes instructing his pupils to pursue independent study, leaving the academy's newest prodigies bitterly disappointed. These elite students, who entered the prestigious halls with soaring ambitions, quickly dismiss him as a fraud. Their frustration culminates in a bold challenge: a high-stakes Geas duel to force his immediate resignation. But Setsuna, with a disarming smirk, turns their scheme on its head. He refuses to face them one by one, instead demanding they all attack him at once—and warns them, with chilling calm, that they must be prepared to accept whatever consequences follow their defeat. What unfolds is a brutal and mesmerizing spectacle. With perverse ingenuity and devastating magical prowess that defies all conventional logic, Setsuna systematically dismantles the academy's "once-in-a-century" talents, exposing their arrogance with every calculated move. Yet, beneath his demonic grin and cruel methods lies an unsettling mystery. Is he simply a sadist reveling in their humiliation, or does his unorthodox brutality serve a deeper, hidden purpose? As the dust settles on the humiliated prodigies, one thing becomes certain: at this academy, the most dangerous lessons are taught by the one who claims to know nothing of magic at all.