Edit: I wrote this immediately after I read the manga so I am writing this disclaimer to say that I have tempered my opinion a little, but not too much. I'm not sure if this is the best work of fiction ever, but I think it's one of the best manga I've read and was genuinely a flawless reading experience. Now for the review. I just finished this about ~90 seconds ago and I can already tell you that this is the best manga I have ever read, and maybe the best work in any medium. This story is utterly concise, simple, and beautiful. Each character, place, person,thought, expression, and event is wonderfully developed to give the reader a sense of attachment to the setting and characters, which is so outstanding for such a short work. You should read this manga ASAP, unless you are able to somehow get your hands on a hard copy. In that case, it's worth the wait, because you're going to want to hold this single volume tight to your bosom once you've finished.