My addiction to high school drama started with this. Park shin hye and lee min ho with woo bin and min hyuk' charming character made this drama amazing!!

Park shin hye definitely suited her role or she made the role suit her. Her ability to make the character sync with her is an amazing ability as actress.
Lee min ho, well, age really doesn't matter and he proved it when he nailed it at acting like an underaged teenager.
Kim woo bin, well, his antagonistic but protective, misunderstood knight really suited him well. He's like a puppy that wanted to be pat but bites cause he's afraid to get hurt.
Min hyuk's presence just made the whole drama lighter. His smile is contangious.

Over all, its an amazing drama that hooked me long time ago. I remember rewatching this for more than 10 times!! ???