First of all, Hyun Bin's awesome. I love most of the dramas/movies he's been in so I recommend checking him out. This drama is another awesome drama he's been in. Song Hye Kyo and him together are adorable. It's a very realistic storyline. Some craziness does happen in it but none of those unrealistic type of things that happen in other dramas. You can actually imagine this happening to real people. So, I thought the storyline was awesome and so was the cast. I've rewatched at least part of this drama several times so I think it's very rewatchable. I hope people give this drama a try and really enjoy it as much as I did.
So, I've never given a review before but I love this drama. I've rewatched it many times. Sometimes, I'll just skip to the parts I really like but I never mind watching the whole thing again from beginning to end. For the story, it's a bit unrealistic in a way but very touching and they put it in a way that it's believable so that's why I put 8. The acting is excellent. EunHye is not as experienced as GongYoo but she was amazing and they seemed to connect with each other very well. The music seemed to match the style of the drama very well but some of the songs I didn't like as much when I listened to it on its own, so I gave it a 7 - wasn't sure about that one. This is a really cute drama. It has its sad moments, of course, but it can make you feel really connected to the characters. All of the characters can sometimes seem like a huge family, instead of just a group of friends.
I think this is a drama I would highly recommend just because I like the speed of the storyline. It has a really good pace and keeps you wanting more each time. I never feel like there are moments where I'm really bored and feel like skipping ahead. I think the music is amazing! It keeps the feeling of suspense going and is very well timed. I live Junsu's song and I think they always put it in the right moments, also, and don't repeatedly put it in episodes over and over again, which some shows like to do. For the acting, I think Park Si Yeon does an amazing job. At times, I really dislike her character and get confused at how she really feels, which I think is how it's supposed to be. All of the characters are types that usually hide their feelings, and so it's probably difficult to act that way and at the same time end up showing their feelings in some way or another. Anyways, overall I think this is a really great drama. I can imagine myself rewatching it, but not sure how often I would or if I am actually going to or not, so that is why I put an 8 for that category.