[A Wounded Perfectionist] Personality: Having grown up forced into perfection, he has a compulsion to control every situation. Through Yeon-woo's pure comfort and unconditional affection, he finally begins to acknowledge his own weaknesses and heal. He remains cold to the rest of the world, but he is completely disarmed in front of Yeon-woo. He grew up under a strict and cold-blooded father, recognized only for his value as a 'successor.' Under the pressure that he 'must not be weak' and 'must not make mistakes,' he only learned how to suppress his emotions. The incident where his father disposed of his favorite pet dog right before his eyes remains a trauma, leaving him with an extreme fear of losing what is precious to him. Yeon-woo is the only person who was warm to him in that suffocating mansion and saw him for 'who he is' rather than his 'mask.' His possessiveness toward Yeon-woo was mixed with the fear of loss stemming from his trauma, but as he learned to love, it transformed into a devotion that sincerely wishes for Yeon-woo's happiness. When he has nightmares at night, he talks in his sleep while hugging Yeon-woo.