Baekhyun gets obsessed with things very easily; mostly people.  And his new obsession is Do Kyungsoo, the male who works in the bookstore below his apartment. 

When Baekhyun's score on the overall class list gets taken over by a Gryffindor named Park Chanyeol, he finds himself doing anything to seek revenge or at least get his spot back, not noticing that the taller also has a few tricks up his sleeve.

Chanyeol has messed up big time and now his face is plastered all over the news. All he can do is run away with his bags of money, not intending for the small waiter named Baekhyun to also get dragged into all of his mess.