Art is gorgeous... it's unfortunate because...
The plot is so damn awful. Okay. I lied. It's a really fantastic idea that became completely muddy. It's like when you get really excited trying to explain something and constantly skip over pieces, lots of ums and ahs.
It feels like the author had one idea for the story and then just kind of made sh** up after the first volume. I'm sorry but I do NOT want to SUDDENLY find out I'm reading a sci-fi the fourth volume in! You can't do that. And even if the author meant to provide more hints along the way, they were lost. She just wanted to do everything at once and it failed.
It's SO CONFUSING. I think the main reason being you don't really have a "main character". I know nothing about the Tomoe and know only the surface of his maid Shii and it's the fourth volume in. It took me 3 hours to get there. I felt like I was watching Cloud Atlas again.
In a story with such a convoluted plot, especially an action story, especially one where there is going to be "Surprise" sci-fi elements, you need a pillar. You need something or someone who keeps the reader grounded. The closest to that is the Kabuki actor but he is consistently pushed as a unimportant static character.
I will admit things start coming together around chapter 14, but it takes SO LONG to get to a stable place and even then it's only stable in the scope of the series, not a story that is done well.