Story: I chose this drama because it was short and 8 episodes are easy to watch. I didn't expect much, but it was much much better that I had though and I liked a lot.
It's a bittersweet and realistic (in a k-drama way) story of friendship, love and how to go from youthfulness to adulthood.
Acting: I had a serious second male syndrome with the male lead Choi Min Ho. His character is so kindly and gentle that even unwittingly you root for him to win the girl. Even so, I liked the ending, it's realistic, there are no tropes and it's a very fresh show to watch.
Music: I don't remember much of it, but I think it was ok through the drama.
Rewatch value: perhaps I will see some parts of it.
Final conclusion: without any doubt I recommend this drama if you want to see something fresh where you are going to smile so much that probably your jaw will hurt. Enjoy it!