Your sister(Choi Ae Cha) is the closest assistant of Exo-M.She helps them with their foods,drinks,towels while they are practising and while they are filming.Also she helps them escape from crazy fans and helps disquise them.You(Choi Eunji)used to like Exo-M but now you don't like them because of an interview you had watched.In the interview you didn't like their arrogant attidutes.They weren't all arrogant but they showed a little for fun but you thought it was true.You hated people that were arrogant because of the past.But there was one person who looked really arrogant and that was Chen.He was really arrogant in the interview and since then he was the one that you didn't like at all! But one day your sister had to go to your parents in America because your mother is sick and she asks you to take her position.What will happen then???