Digital painting

I wasn't actually going to paint anything. I was studying and the study got so much bored and i wanted to take a little break. So i thought i would just do some digital doodling.
I found a ref image and started to draw. But no sketch or organizing or anything.
This was done all on one layer. No erasing at all.

I didn't hope for it to look anything like this therefore didn't take any process shots.

Reference image that i had open while drawing this. Mostly used it for the hair style and the light and shadow.