Does anyone have any leads? In previous life, MC spent 10 or maybe 20 years in prison. (Not sure how long or why) After he is reborn, he realizes he is back to his high school years Had a crush on a teaching assistant in previous life. Now he wants nothing to do with the person Teaching assistant already knew of his affection and used him to pass messages to some people MC wants to take revenge. Novel setting involves underworld gangs and ML is leader of the most dangerous and powerful gang in the city ML is also involved in the business world. MC decides to start his own gang and recruit people through fighting MC also wants to save one of his cell mate from his previous life. That cell mate has a son. MC takes him in and help send him to school. MC and ML meet when MC rescues ML and lets him stay at his place.