MTL - The Paranoid Protagonist is Addicted To My Stickers - Chapter 27 Achilles' heel

The MC (Minato) is a college student who died in a plane crash and was reincarnated in a fantasy world. He was raised alone in the wilderness by his succubus mother, and now he tries to make his way as an adventurer.

Once an unsung slave; Yur’s existence was defined by blood, pain, and chains. That was until he stumbled into Zulmasharr, the realm of demons.In the depths of despair and agony, a near-death encounter unsealed the terrifying truth of his existence; he is no mere mortal. A cursed hybrid of human and demon; Yur’s survival was only possible through the bloody rebirth of his Ashkavaal bloodline and the awakening of his sinister cultivation system, Zul.With Zul, Yur can rear demons for rituals, harvest their power, and dominate the chaotic world around him. But freedom comes at a cost. As the incognizant successor to an ancient being, his every step is burdened by the weight of a destiny he never asked for. Yur craves only one thing: to stay free, unbound by demons and men. Yet his growing power and severed bloodline ignite the fascination of forces that would see him enslaved or slaughtered.Yur must steer through a world of demons where trust is a fault, survival is animus, and his very existence is a blemish. Blood will pour, flames will revolt, and demons... they kneel or die. But in the end, is freedom attainable for the bearer of a bloodline forged from blood and ash?Will Yur vanquish his fate or will it condemn him?

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.