He had to work hard to earn money to pay for his mother's surgery. He accepts Juwon Ryu's offer to leave his crew, friends, and lover, come under his control to train hard and become the leader of the Ghost Crew in place of Hwangyeon, the person who bullied him. Instead, Juwon paid for all of his mother's surgery costs. It didn't matter, he became a cold and lonewolf. He stared intimidatingly that others thought he was a ruthless and bloodthirsty troublemaker.