Looks good, but unnatural

I like the contrast you have used between her dark skin and her light hair. The arms crossing over her chest and the way she supports her chin come together to convey both a certain level of contemplation and innocense that works to complement her nudity (which conveys purity in this image, rather than sexuality--another good effect). Also, excellent detail on the eyes. I can tell you spent a lot of effort getting those just right.

However, I think you are using a little too much canvas when drawing her face. Given the rest of her style, the eyes should be a little bigger while her lips and nose should be a little smaller. That would bring help to bring her facial features more in proportion with each other and with the size of her face. She is missing one of the lines that helps define her left breast, it just disappears under her arm. That missing detail hurts the image substantially.

Overall, good work, but I think you can do better.