The idea of rain summoning through music is an interesting one, and does add some points of interest. The sound track for these bits was really enjoyable and they did make some emotional connections.
However in the end, I found the characters fairly flat and their motivations and backstories felt rushed and lacking. I feel like it had a good bit of potential, but the story ends up losing its way somewhere. For example, I felt we needed to see more of the character's initial misunderstandings for their relationship to really feel like it had some solid tension. Also the young king's backstory is emotional, but I felt like it lacked a good bit of depth. There was some limited attempt to add backstory and detail, but limited number of episodes may have prevented this, or it may have saved us from a bunch of random filler, we'll never know.
You may find this more enjoyable than I did. I stuck around for all the episodes because I did like the characters to some degree, and I figured I'd stick it out to see the end given the limited episode count.
