Yoowon has always been in her twin sister, Heekyung's, shadow. Heekyung even holds the heart of the man Yoowon loves in the palm of her hand. Self-conscious and insecure, Yoowon knows she will never be enough to win his affection. But a spicy one-night stand with a new man opens her eyes to possibilities for a life outside of her sister’s shadow and in the arms of a handsome, confident CEO. But how will the world react to a bold new Yoowon when Jaejoon helps her see her real potential?