Hwansaeng Boss

*'Break my organization with my own hands.'* Gang-Jin Faction boss Lee Gang-Jin is the last skilled gangster in the dark world. He unified the country with his fists and rose to the top, but was betrayed by his favorite *dongsaeng* Jo Du-Yeong and died. At the moment of his death, he wakes up in the body of Lee Gang-Jin, a high schooler who took his own life due to school violent. Meanwhile, the Gang-Jin Faction starts a 'Kkanglin Audition' under the pretext of recruiting young members, and delinquent teenages are eager to join. After repeated regrets, Gang-Jin decides to take control of the Gang-Jin Faction he founded with his own hands to reverse everything... (Source: Kakao Webtoon, translated)