I never thought there could be an anime which can surpass Naruto or Death Note for me. But after finishing this series in 2 days and being an emotional wreck for most of the time duration, I can say, personally this is the best Anime I have seen in my lifetime. The writing,character development,pacing,music and the emotion, everything is perfect. It deals with some very dark themes with such maturity and yet it shows the best of humanity. Everyone will be moved by this, I guarantee.