In 21st century Korea, there is a school for students with special abilities. New transfer student Minnow doesn't have any special abilities. He does, however, seem to have a secret agenda.

When Lord Dahn-Guh "accidentally" unleashes powerful demons unto the land, he orders the fool Ondal to recapture them! Unable to fulfill the task on his own, Ondal is accompanied by Hae-Moh-Soo--a legendary, foul-mouthed warrior who helped to trap the demons in the first place--and...David Copperfield?! Along the way, they come across quite the interesting array of characters: a gang of armed nuns, the mysterious Samson with singing powers, the twins Pai and Pei, and so many more!

From ryColaa:

Reputation is everything in a world of icons and popularity contests. So why not score some points here and there by being the nice guy? This is the way Kang Shin-gi legitimizes the fake personality he has everyone believing. Armed with his above average looks and a (completely false) angel-like personality, he has every girl in school head over heels, and all the guys looking to him for guidance. With the exception of having a screwed up cross-dressing devil for a dad, Shin-gi’s life is absolute perfection (*cough* of lies), until one day, Um Seung-hui transfers to his school.

While being a complete martial artist freak, she also likes to fib just a little in front of those who know her… you know, like acting like she's just a scared little girl who'd play with kittens rather than break brick walls with her head! After all, how can anything go wrong when you're as cute as Seung-hui?

Fate has brought these two masters of lies together, and the two must battle it out to see who will be crowned the undefeated heavy-weight champion of fakeness!