What was up with Gu Jun Pyo's hair?

I quickly came to find with a lot of these high school/college age dramas, that whoever hates each other in the beginning will be the ones who end up together at the end. This is a really tired trope that is used everywhere. Not sure if this is a good thing for young people, especially girls, to think that constant abuse is okay & it will all work out in the end.

One more thing, WHAT WAS UP WITH Gu Jun Pyo's Shirley Temple curls? Not sure how anyone playing opposite of him could not break out in hysterical laughter?