I am going to be honest if you really want to watch something that would moe your heart and make you feel sad and happy at the same time, just watch it. I can't even describe my feelings towards it in one sentence. before I started to watching it i was like "Nah, this is going to be boring and staff" but after I watched the first ep I couldn't wait for the second one to be released and I just couldn't stop my tears from falling and believe me if you're saying that you will not cry, I am telling you from now you will so don't forget to bring a packet of tissues with you, and I mean the large one ;)
For the music, it was amazing and each song was wonderful.
The acting was really good in a way that you would actually feel like it is a real story.
I am definitely going to rewatch it again when I am free and I can't wait for it and I am sure that you will like it as well.