@Gedeon Thanks for the crit. There's still quite a bit I need to work on in the picture. I hadn't really worked on the bookbag strap much, but I'll definitely see about it when I get back to it.
@Joosh Thanks man. Looking at it now it does seem short. I think I was at first trying to apply some foreshortening to it but I don't think it come across very well.
So I'm taking a small break from painting and decided to work on my linework. Here's a couple quick sketches from groupboard.
In case the pic offends anyone - spoilered