Exo-K, the most popular idol group in Korea. "M", the most feared school gang in Korea. Members from both group battle to win the heart of a girl, Li Sno. She devoted her life to studies but her life is about to take a big turn when her best friend is engaged to Park Chanyeol from Exo-K. Sno was set up to date Byun Baekhyun who is also from Exo-K but slowly she realized that her heart is somewhere else, somewhere in the hands of Par

He leave then comes back then leaves again. I choose to be faithful to him. I will wait and wait till he comes back. He promised right? Chanyeol, please stay with me.