Both of them were in the same high school where Hyorin was once a geek and Jinki was just a study genius. They shared a unique bond which Hyorin always refused to acknowledge. He was her first kiss. 

Many years later, as if fated, they meet each other again. Hyorin jolly well knows who Jinki/Onew is. However Jinki/Onew is plain clueless about her and their history. But somehow at the first meeting, Onew is naturally intrigued by her. His intuition just tells him that he knows her from somewhere and he is sure going to find out what it is...

A love story between Onew and Hyorin (YOU).