Seo Jung-woo, played by Lee Joon-gi in the 2005 Korean drama “My Girl,” is the son of one of the major shareholders of L’Avenuel Hotel and the best friend of the main character, Seol Gong-chan. Unlike Gong-chan, who is responsible and hardworking, Jung-woo is known for being a flirt and having many girlfriends. Despite his playboy image, he is a loyal friend and often provides comic relief in the series.