Sunny Kim, a pretty, yet irresponsible child of a CEO can either choose to be cut off forever or marry the mystery man her father has chosen for her. On the other hand, Sunghoon Park is humorless with a deadly handsome face who has no intention of playing the loving husband to the spoiled rich kid. But before long, he felt a sudden change of heart when Jay Park, his brother, an infamous playboy has taken interest in his wife. And not to mention, when Riki Nishimura, Sunny's ex-boyfriend, finally has the courage to win her back after realizing his mistake of letting her go. Will one of them win Sunny's heart?