Nice shot, the first thing that grabs my attention is the highlights on the one side of the body. One arm seems a bit brighter than the other, show even more on the elbows. The shot is a bit dark, to a point of loosing details in the shadows. Almost looks like a converted from color shot. The image tells a interesting story. IMO it seems to tell that the model is of a submissive, shy personality. By bringing the jaw up in a slight bit more towards the left can improve that story to a bit less of the shy but keeping a slight feel of the submissiveness. I believe this shot could be greatly improved with a bit more fill lighting, or a reflector or two.