Kyungsoo is vulnerable, still hotheaded nerd-looking boy with the dorkiest hairstyle of mushroom-like hair ever available.

Chanyeol is a swagger gang leader who’s also a playboy and a bully who targets weaklings just for entertainment.

Kyungsoo, being a greatly easy object to be bullied, of course couldn’t escape from the bully’s targeted list.

But somehow Chanyeol have that kind of "feelings" towards Kyungsoo, and somewhat the teacher seemed to play them two…

“Kyungsoo, teach Chanyeol math.” “Kyungsoo, teach Chanyeol languages” “Kyungsoo, teach Chanyeol etiquette.” And so on.

Being the all-timer first ranker in all subjects, the teacher entrust Chanyeol’s education to Kyungsoo’s self.

And in between the love-hate relationship, somehow the switch of both Kyungsoo and Chanyeol’s heart shifted…