Ghouls. Demonic creatures that eat humans. It doesn't matter if you are alive or a rotten flesh, fat or skinny, young or old. They'll just devour you!  Si Jin and his cousin Mark, are amateur boxers. Now, Mo Yeon the hottest girl in school is in a mission of "popularity, attention, fame and glory and also inner beauty(???)", recruited these two fighters to protect her in her investigation to find out whether the old block in their school was really Ghoul-inhabitted...

Based on Ed Sheeran's Perfect...  (I don't own "perfect" and "dots")

How "stuff" happened between these two. They're in their 10th grade, and they were put in the same class together. Song Joongki with the Miss Valentine's Im Yoona. Will they survive 10th grade?  Will they be able to have their own happy ending? Just maybe... 

What if you bumped into your ex somewhere unexpected? Who knows what the end will be? Will two hearts be broken again? Or maybe only one... Or maybe, Happy Ever After?