Ok, this is my first review, so I'm going to be frank. This is one of the best animes I have watched recently, and I highly recommend it.
Story 10/10
Why? because it was completely original like nothing I have ever seen. Had me guessing the whole time about what was going to happen...
Art 10/10
I just loved the art on this one. Especially the eyes...
Sound 9/10
Even though i absolutely LOVED the opening, the ending didn't appeal much to me...
Character 10/10
Every character is well thought out, and completely understandable. Great character development throughout the series.
Enjoyment 10/10
I enjoyed every second of this anime. And when i say every second, I even mean the opening theme.
Overall 10/10
A must watch anime. Whether you are planning to watch it or are already watching it, It is perfect for everyone (except maybe for people who are not into sad memories and such...) But it was worth every tear I shed... go watch it now!