The Quiet Don: 893 Side Story

Being the son of the leader of the largest organization «893»,  SPRInG chose not to join the gang and became a rookie designer of an underwear company. However, the assassination of his father forced him to inherit the gang, with one condition: keeping his day job while hiding his true identity from his coworkers, who is his love interest as well as the only person capable to keep his violent instincts contained.