I know I'm in the minority on this review. 
 I just felt this book was generally too long. I've said this before, but I think the period of the main character being like, "Oh I did this weird thing/this weird thing happened to me -- what am I?" should only go on for about two to four of those weird situations and then reveal what the character is already. I will admit that I think part of the reason this book felt so long and drawn out for me is because I was listening to it on audiobook. Maybe I would have felt it moved more quickly if I was reading it, instead of feeling like it dragging unnecessarily with no answers. 
 (view spoiler)[We don't find out who Karou is until waaay late in the book, and frankly, that just annoyed me. I did not particularly like the layout of telling the one story and then telling the other story after that. I felt the two maybe should have been intertwined throughout the book, going back and forth. Reading parallel, but then at the end you discover it's not parallel stories but really -- you know, what it is. (hide spoiler)] 
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