>>281529263
Volume 10 has chapters 91-100
The bonus illustration book is pretty much just all content Neko has posted or had published elsewhere already, honestly I was a little disappointed by that, it has an original comic at the end Mahiro practicing for art class drawing still life, Mihari gets him to draw her doing a gravure pose, Mahiro is a surprisingly good sketch artist.
>pastelised version
I want to believe that but its cope, Neko changed the colours for the bonus illustrations to match the anime, the last one in manga colours was 77, since then its all been blue and pink-ish. The cover for thin book 34 is also the blue and pink, you can also see a point in the illustration book where he switches to the anime colour scheme. Maybe Neko prefers the colours the anime made or maybe he's using the anime colours because they're more recognisable and so might sell better?