Hajun was born in one of the most prominent financial conglomerate family in Korea. Due to his demeanor and looks, he was nicknamed 'Smiling Young Noble', but he is actually quite sadistic in nature. Because he was born in a complicated environment swirling in conflicting interests and ulterior motives, he lived half of his life very fiercely and swore to take revenge on both of his parents in his heart. He hides his true feelings but cares about his friends.