When a Man Falls in Love is a 2013 South Korean television series, starring Song Seung-heon, Shin Se-kyung, Chae Jung-an, and Yeon Woo-jin. The story revolves around a world-weary gangster as his love life intertwines with three others, and how the course of their lives changes entirely based on one moment of fevered passion. It aired on MBC from April 3 to June 6, 2013 on Wednesdays and Thursdays at 21:55 for 20 episodes.