Story The story is pretty unique. About souls, reincarnation and fate, it has many deeper meanings that you would never find on another manga ever. I would have liked if an epilogue was present, because the last part of the ending was quite weak. Art Old but gold. Character Every character had their own developments. They felt all alike. Obviously, by being "reincarnations", they share some similar details with each others, but it's not a bad thing.Enjoyment
It is definitely mind-blowing, and may give you the yearn to re-read it after a while.
It's quite short, so it won't definitely annoy you!

Overall
It's definitely rare to find a manga like this. I would suggest it to anyone as a must-read! No exceptions!