Riri Ahn Yu moves to a new school in Seoul,South Korea with her two best friends,Haven Liú  and Luna Hwang, during summer after getting a musical scholarship to start a Korean Pop group.After several weeks of convincing their parents, they managed to move by age 15. They enter a new school by SMEntertainment to began their training to become idols,but at this new school they meet another group in training to debut soon, Exo.Riri and her friends,being new, came