Haeyoon SUH-pretty, sloppy 18-year-old girl who is attached to the thigh to the skillful Sungmoo Kang. Sungmoo, tolerant, compassionate and carefree best friend of his brother Haeyoon, Haeil, has always been a man to whom Haeyoon is drawn. For everything. Since they were children, Sungmoo was there to comfort Haeyoon, when Haeil is in full swing with discipline, but over the years, all three boys were distant. With Sungmoo, trying to keep the contradictory Haeyoon at a distance, Haeyoon can not feel that his heart is broken. Just as everyone could not worsen, Wooje Kim, an evil schoolboy, turned his gaze on Haeyoon ...