This is one of those shows that start off strong and then fail to keep up along the way. Frankly, it's a mix of brilliant episodes and episodes that waste your time. In the middle of its runtime you will see actual filler episodes that do not connect to the main story in anything other than featuring Shounen Bat, the poster boy of the show, one of those episodes is even openly framed as a collection of fictitious rumors that bear no resemblance to reality. Personally, I do not feel that a 13 episode show can afford to pad its numbers with filler in good conscience, but you may have a different opinion.
Looking at the plot itself, it's unsatisfactory at best. It ends up feeling as if the entire journey between episodes 1 and 13 focused on all the wrong things. Sure, it was supposed to be misleading at many points, but in the very end the show only confused itself. What it identifies as its main antagonistic forces ends up being superficially inflated. Suddenly, it's everybody's problem when there is nothing to actually support it being so.
Reading this over, it feels like a 'Not Recommended' review, but I leave it at 'Mixed' because the good parts of this series indeed rattle your brain and are very enjoyable, the art is pleasant and the opening is top-notch.
Go for this if you think you like weird anime. Or don't, because it's not going to be weird enough and you're not going to lose too much.
