Kim JooMi (You) is a high school student who is suffering from lung cancer, she is on the fourth stage of it and she is afraid to die soon. But her world will change, if she met the gorgeous lead dancer and the rapper too of the kpop group EXO-K. She really wanted to learn everything about the world, and so Kai met her and thought that she's interesting ~~ ♥

Lee Mi Sun is pure of beauty and goodness. Wearing glasses or not does not hide any of her beauty behind. She only has two best friends Mika and Hae Jung. She doesn't trust anyone except for these people. Though she barely trusted many people, she still helped them no matter what. This image of her draws her more and more attention from fans even though she disliked it.  Kim Jongin a.k.a. Kai gives a very cold image around people he didn't trust just passing by people like nothing was there