I noticed there's a whole lot of italicizing of Ai's thoughts, especially at the start of chapter 1. I don't do a lot of (any) writing, but if the book is already first person, do Ai's thoughts really need to be italicized? Everything at the start of the chapter is already her thoughts if she's the one narrating the story.
Later it goes to third person, but the first person section at the beginning I don't think should have any italics for thoughts, right?