Zettai Maken no Duelist: Ansatsu Kizoku ga Dorei Reijou o Ikusei Shitara, Majutsu-goroshi no Kyuukyoku Makenshi ni Sodatteshimatta ndaga

In a civilization where magical aptitude dictates social standing and personal worth, Jin, a nobleman born with the heretical gift of nullifying sorcery, has carved out a double life. By day, he is a minor aristocrat; by night, he moves through the underworld as the "Anti-Magic Noble," a shadowy fixer whose spellblade technique—an art specifically designed to sever enchantments and counter incantations—makes him the deadliest weapon against mages. His solitary existence takes an unexpected turn when a routine mission brings him face-to-face with Lynette, a young slave girl bearing the marks of cruel experimentation. Moved by an impulse he cannot fully explain, Jin severs her bonds and takes her under his tutelage, setting in motion a chain of events that will challenge the very foundations of their magic-obsessed world. To further his covert objectives and shield Lynette from those who would reclaim her, Jin orchestrates an audacious infiltration: he secures a position as the sole male instructor at a prestigious all-female academy, a bastion of highborn sorcery. There, surrounded by prodigies and heiresses of powerful magical lineages, he begins secretly training a small class of misfit students in his unorthodox, anti-magical combat style—a discipline that flies in the face of everything the institution holds sacred. As Jin navigates the political minefields of the academy and nurtures Lynette's latent potential from a broken girl into a formidable warrior, he must balance his role as a mentor with his ongoing shadow-war. In a world that worships the arcane, this renegade swordsman and his unlikely disciples are poised to tear down the established order, proving that the greatest strength often lies in defying the very laws of magic itself.