21 parts Complete Dong Yejin (Ailee) is going to a new high school which is Byeol High, a school where idols and trainees study. Yejin is still trainee at YG entertainment. If she passes her first year here she'll get to debut. Her older brother Dong Youngbae also known as Taeyang is attending their as a senior. There is a little rivalry in this school, since this is a school where idols attend, they have these little groups where all the labels are. For example,Yejin is training for YG, then she has to eat with them, hang with them, and sit with them. She has to attend their group activity and such, but since she's training, she doesn't have to do it consistently. Then their is another group, SM Entertainment, YG's rival. Group called EXO has eyes for Yejin, but Taeyang has to forbid her since it's against the rules even for a trainee. Will Yejin get through this year without any danger? Also her cousin Namjoon also known as Rap Monster from BTS is attending with his members.
