Key was a broken heart man back then. He had taste how it feels to had your heart broken by a person you loved. He has been in a broken heart for a years before she met SooYoung. Since he met her, he know he had fallen for her. Key loves SooYoung with all of his heart. But, he afraid to tell her. Key afraid he will get brokeagain. But however he finds it hurts when he saw her with someone else.