Guy who was literally bullied to death and essentially murdered ends up coming back as his kind-hearted teacher, but this time, he's not going to let his tormenters get away scot-free. Giving this a chance, it can either be really good or fall flat with the revenge storyline.
Edit post ch 8: He had sex with a student in his teacher's body. I don't care that he's mentally 15/16, he's still trash with revenge as the only thing on his mind. MC doesn't seem to care about the repercussions his teacher could face once he gets his body back and the fact he's only using it to further his revenge agenda :/
Textbook of Revenge