At age 4, Sooyeon and her bestfriend, Sungjae finally got into pre-school. They promised they would grow up together. In 11th grade, Sungjae wanted to try out for Cube Entertainment. After a few years, Sungjae came back to school. Sooyeon now was whole new girl Sungjae never known. "What happend to you?" Sungjae never knew what has happend to Sooyeon until he meets Kai. The popular kid that was ha