Peachy School Train

Or at least give us a book or artbook or anything...

Yeah. The coloring seems a bit off. The flush in her cheeks is more yellow then pink or red on the first page; other spots on the pages look overly red, there are lots of little dots in a lot of the colored in areas (especially where it's more red); and there are quite a few lines through the colored part of the image that make it look like it's made up of a patchwork of squares.

However, I don't know how much of that is because something went wrong, and how much it is simply a side effect of how the images were drawn or colored in. It's not all that uncommon for manga to look a bit poor when you look at it really closely - especially in the areas where the image is filled in. So, I don't know. But the fact that her blushing cheeks are more yellow than pink or red would seem to imply that something actually went wrong rather than the techniques the artist used just not holding up as well to close inspection as would be nice.