drama or movie

Pretend to be ugly but is actually pretty/handsome Pretend to be weak but is actually v. strong?

I think was korean, i only seen move picture, but in picture this boy was walk, and another boy stop him, then they were just looknig at each other. it was in a pink-ish background, and they weere wear white clothes, i belief. sorry can't explain more. >.< Gomen nasai.. I think it's pretty...