Makes me think of the - very - old photographic plates with their speckles and stripes. The only thing here is that the grain does not match that concept, but it works in this photo. That's it for the technical side of the story.
Emotionally this is mysteriously and sexy. The face in the shadow. The soft light on the (beautiful) breast and the skirt pulled up and apparently just laying around - blown by the wind - revealing a part from the leg adds to the erotic emotions without being excessive. Like I said: wonderful!