Teenage Exorcist

With the power of his right arm, the main character, Woo Su-Kwang, who has always been good at fighting and overpowers the best at each school he attends, is a legend among his high school peers. However, his wish is to live an ordinary life just like everyone else. Then, by chance, he met the head teacher, Park Su-Ho, and it turns out that he was an exorcist. He said he would teach Su-Kwang how to control his right arm. The condition is that he joins the exorcism club. (Source: Kakao, translated)