I think this drama started off strong, but lost steam as it went along. The ending episode was meandering and pointless, honestly. It had a happy ending, but was lackluster and bland. I think that if they had cut this show to 16/32 episodes instead of 20/40, they could have written a tighter story. There were some things that got lost in the story, some things that were never explained, and some things that dragged on way too long. The romance sizzled in the beginning and then flickered and died, and then when it rekindled, it was barely an ember. One thing that some people liked, but kind of annoyed me was the lighting in the show. Every time the main characters were about to have a real kiss - there was always this bright light shining between them. I guess it was supposed to be artistic? Once would have been plenty for that and it might have been ok, but it happened at least 3 or 4 times.
Most of the actors did a good job. Ji Chang Wook and Nam Ji Hyun are both fantastic actors and I love to watch the play of emotions on JCW's face. NJH is so earnest and sincere in her acting. Choi Tae Joon as Eun Hyuk was such a cutie pie and his awkwardness and his boyish charm and enthusiasm were fun to watch (this was my first show with him.) I wasn't really impressed with Nara or her character. She was bland and we didn't learn much about her. I thought Kim Ye Won was a scene stealer though! KYW as Ji Hye started off as an unlikable bully and a cheater, but she quickly became one of my favorite supporting actors in this show, and I kind of wished she had been the second female lead instead. I loved her snarky comebacks to Yoo Jung - she made me laugh a lot. And Dong Ha, as the villain Hyun Soo, did an amazing job. It's the first time I've seen him in anything that I recall, but he nailed his role.
The music was decent, nothing stand out, but appropriate.
I won't re-watch this. It was ok, but not one of the best I've seen. I think the longer run time severely hurt the pacing.