This is a spoiler free review for the whole series as I don't like rating individual volumes and would rather rate the series as a whole. 

This is an amazing manga series which deals with some dark topics but handles them really well. It was the first manga I picked up when I was getting back into reading and I'm really glad I did. It's an emotional and engaging read which makes you think about the people around you. I love the journey the characters go on and their emotional development. The art being pretty doesn't hurt either!