Promise?

Characters:
Xi Luhan (EXO-M) & Wu kris (EXO-M) & Jung Jessica (SNSD) & Im YoonA (SNSD)

Description:
Yoona and Luhan went to the same university. But Yoona was just a regular girl who isn't smart and wasn't popular. Which on the other hand, Luhan was a smart kid and popular, which is very well known by other, especially by the girls. One day, While Luhan was sitting in the classroom, staring out the window and saw Yoona sitting under a tree with her eyes close. He notice that she was very different from other girls because she sit by herself while other girls play and chat with their friends. Luhan was very interested in Yoona to the point where he want to know more about her life. Read more to find out what things luhan found out about Yoona's life and what happen between them as time goes by.