The premise of the manga, and the first ~20 or so chapters seemed great to me. I started losing interest after they added more and more layers with characters coming in, new enemies, relationships developing into something and then being completely forgotten about. It's like the author knew what the story was going to be to a certain extent, but didn't expect to make it past 20 chapters and started spit-balling. I still enjoyed it, looking forward to whatever he works on next in hopes that it has a more cohesive story.