This manga took me by storm. I'm a huge fan of the ones that start out innocent, even possibly mistaken as a kids show, only to get incredibly dark. In that sense, this manga hits the spot perfectly. But the plot itself is great. The author sets up a solid foundation and links back to things from the very beginning that you wouldn't think twice about at that point - but not so that you forget it happened. It makes you go, "Holy shit! THAT's what that meant!?" The characters are amazing. Really great development. It's rare for a manga that introduces so many charactersto not be overwhelming/chaotic, but the author manages it superbly. You feel a connection to most, if not all, of them.

Plus, it says something that even the shadows have in-depth personalities - to the point where you can assume their facial expressions without actually seeing their faces.

Of course, the fact it's published in full color doesn't hurt.

All in all, this manga has the potential to be 10/10 if the author nails the ending.