The Underworld King of Hell Turns into a Useless Academic Tyrant

When I woke up, I was being rubbed against the toilet floor tiles by the gangster. >"Trash, if you dare to tease Su Yue again, I will break your legs!" >Memory fragments of the original owner flooded into his mind: being blackmailed, being splashed with dirty water, having his pants taken off in public... >I licked the blood from the corner of my mouth and smiled. >The grass on the graves of people who dared to do this to me in my previous life was two meters high. >That night, the gangster blocked me in the alley outside the school. >"I heard that you want to take revenge?" He was holding a cigarette and his face was full of jest. >I took out the sharpened pen from my school bag and stabbed it into his femoral artery like lightning. >"Correction," blood spurted out on my face, and I smiled like a devil, "I have already taken revenge." >In the police station, the old policeman banged the table and shouted angrily: "Can a pen penetrate that deep? Do you think you are making a movie?" >I blinked innocently: "The teacher said that knowledge is power."