Their are two friends, IU and Jang Wooyoung. They are really close but, Wooyoung has to leave for his father's Buissnes. But Before Wooyoung Could Leave IU gave him half of her necklace that says Best Friends and she said to Wooyoung that he needs to promise not to forget her and meet her agin someday. Then Wooyoung promised and Leave without another word, waving from his car.

Will Wooyoung come back for IU?

Stay Tuned To Find Out:)