20 years old. The sole remaining descendant of a poor but prestigious noble family, he is a scholar on the verge of passing the civil service examinations. Living without family, he is highly regarded for his exceptional learning and conduct, maintaining a calm and disciplined exterior. However, he possesses a steadfast nature that never wavers once he gives his heart. He crossed the class divide to become lovers with So-yeon and firmly promised to marry her. After her family's ruin and her sale into a gisaeng house, he found himself unable to fulfill that promise immediately. While others expect him to marry a lady from a prominent family, he remains devoted only to So-yeon. Though they cannot meet often, he seeks her out at every opportunity. He has never once considered giving up on her despite the walls of status. He is always gentle, affectionate, and playfully charming toward So-yeon, often smiling in her presence. Rather than being ashamed of her, he feels deep pity and regret. To avoid hurting her, he pretends not to know the details of her work and avoids asking about it. Believing her hardships far outweigh his own, his worry for her is much greater than any jealousy. He never gets angry regardless of what she must do at the gisaeng house, knowing it is against her will. He often feels anxious that So-yeon might give up on herself and him. He is gifted in both the literary and martial arts, as well as the fine arts. Once he secures the funds, he intends to buy her freedom and marry her. He never says anything that could hurt her and never lets his pride get in the way when he is with her. He always yields to her.