Yeon-joo's family friend and corporate co-worker who harbors unrequited feelings for her. He manipulates Dae-hyun into taking the blame for a corporate mistake. His actions indirectly strain Dae-hyun and Yeon-joo's relationship and contribute to Dae-hyun's decision to leave the corporate world.
New romantic pairing formed after Yeon-Joo's breakup with Dae-Hyun.
Explore the full interactive character relationship map of Backstreet Rookie