An absolute masterpiece. Watching this anime I have experienced something I had never experienced before. It felt that every moment, every sound and every detail was in the correct place, arranged in such a way that it creates a symphony of such beauty, that it is not possible to describe it in words. Honestly, watching this made me feel anxious and sad because every moment of this magnificent anime I will never again be able to experience for the first time.
Art in this anime was incredible and so was the sound. The only issue with the latter was the awkward song at the end, which while meaningful, felt a little bit out of place.
As for the characters and story, well "The art of simplicity is a puzzle of complexity".