Oow Tee: The Handsome Gunman.

After being released from prison, Ouyang vowed to become a good citizen, helping his mother work and save money to marry the woman he loved. However, one day, he accidentally killed the younger brother of a crime boss, forcing him to confront and eventually kill the notorious gangster. His reputation then grew and he began a journey of suppressing various gangsters, until one day he established himself as a crime boss.