Oh this has such a nice feel, like an old master drawing. Did you color the paper in photoshop or use colored/aged paper? The figure is beautiful with such delicious contrast it brings her to life but keeps her a drawing! That kind of work that tricks my brain is something I love to see~♪
This is beautiful! My only comment is actually on the background, because the girl herself is absolutely perfect I'd suggest a gradient for the background, with darker shading on the right and lighter shading on the left (oposite to the lighting on the figure). This will really make her stand out more, especially in the bit of her right cheek (our left), where the reflected light on her cheek is very similar in value to the background, and they're melting together a bit.