Back lighting is tough and you've done a decent job on this one! I think the eyes are really good, they convey emotion to me which i think can be tough for a line art. One thing i noticed straight away is that the girls breasts seem lopsided. The left one looks bigger by a noticeable amount and I'm not sure if it is just the angle at which it is drawn or just a lack of defining lines to express the right breast. Overall i think you did a great job, lighting is one of my biggest problem areas and this one looked tricky. I think you could have improoved this with a bit more contrast where the light falls, for example on the boot, left shoulder and top of the head.