At first i also didn't like man ok's hair. Buy I still kept watching it for no min woo's sake. As I watched it, it became more interesting throughout each episode. Around episode 25, man ok changed her hairstyle. It was pretty, but it made me feel no difference, because I still enjoyed the drama! I rate this drama 9/10. I don't understand why it is rated 7/10! (Maybe it's because of the hair...) Anyways!! Personally, I think this drama was really good!!!!!!