HIGHLIGHTS: This is a very interesting drama that will bring tears to your eyes and tug at your heartstrings. If you're looking for a drama that will give you the feels and bring a smile to your face, then you should give this drama a chance.

STORY: I really liked the plot of the drama overall. It reminded me of movies I've seen before and liked, like "Groundhog's Day," "Eternal Sunshine of the Spotless Mind," and "Your Name," but with a little more fantasy involved (and a slightly lower budget). Time-traveling stories are usually interesting, funny, and heart-wrenching, and this drama is no exception. While the summary of the plot makes it seem really cliche, it's actually not. Without giving anything away, it's not so much of a story about a guy trying to get his girlfriend back so much as it is about a guy realizing what's really important in life and trying to redeem himself and correct the mistakes he's made, even though he knows it's already too late and some things just can't be undone. However, while I gave the story a 9 because I really like the idea of it, I should add that there are some major plot-holes and some extremely poor decisions that were made on the writers' part. This drama has a lot of potential to be a great drama (better than it already is), but the plot errors really hold it back from realizing its full potential. Since it's a short drama, the writers should have spent more time focusing on character development rather than tossing in all of this unnecessary fantasy stuff towards the end that doesn't really make sense and isn't necessary for understanding/appreciating the story. The ending is also ambiguous and was poorly written/clearly not very well thought out, in my opinion, despite ending on a happy-ish note. It's a drama that's still worth watching, though, despite its flaws.

CHARACTERS/ACTING: I'm a huge fan of Kim Myung-soo (L), so I'm a little biased, but I honestly thought he did a really good job in this drama (better than he's done in earlier dramas he acted in). I enjoyed watching L's character, Yoo Tak, undergo a transformation throughout the series, and watching him and his relationship with his girlfriend, Da In, really makes you think about your own life and time and the decisions that we all make and the consequences of those decisions. Yoo Tak's personality changes drastically throughout the series, and L does a good job capturing all of the character's ups and downs and a whole range of emotions. I, however, was not super impressed with Yoon So Hee's acting. She's an okay actress--she has some pretty weak acting moments in this drama, but also some occasionally strong ones as well. She's definitely not lead actress material, though, so it would have been nice to see a better pairing for the lead actors in this drama, but their acting was still moving nonetheless. I cried a lot and felt very moved by both of their performances regardless, though. If you're an L fan, then you will not be disappointed.

MUSIC: The music is pretty good in this drama, which is always a plus. It will definitely draw you in and give you the feels. L is a great singer, and the song choice for this drama was spot-on.

REWATCH VALUE: I have already rewatched parts of this drama several times. While I probably wouldn't rewatch the whole series from beginning to end again, there are a lot of touching/heart-wrenching/heartwarming scenes in this drama that you will definitely want to rewatch.

OVERALL: Overall, this is a drama that's definitely worth watching. While it has its flaws, it's still a very touching and interesting story and it's a drama that will make you think and gives you things to reflect upon. Even though some people have a lot of negative things to say about it, don't let that dissuade you from watching it--it will be 4 hours that are well worth your time.