Bad quality, heh? What is? The picture or the drawing?
The lineart isn't the best (and no, I didn't flag it). For example the breast's outline is pretty uneven (that's where the whole lines are worst). The arms and fingers don't look very good, too.
Right, but we must note that this is one of his oldest drawing (2011, since his Twitter and Pixiv page doesn't past 2013), so with time, he got better.
So I feel it's normal that is early drawing has flaws (though I've uploaded these mostly to translate, not because of the drawing since I tend to choose carefully what I upload).
I wanted to upload the other but if it's that bad, I'll refrain then.
Updated
Why am I the only one who doesn't have a partner!!