I'm a librarian who loves anime, manga, and reading a wide variety of genres.
This is set up as a story Mei is telling Koichi, about a person named Sakaki. So whose POV is the story told from? Sakaki's, because Mei's POV would make too much sense, I guess.
If Ayatsuji cheats in this book the way he did in the first one, I'll be an unhappy reader.