I disagree about the slanted horizon - look at the photographer - he is trying to make best of the model and some _unexpected_background_behind_the_model_!!! He sacrifices the orthonormallity and even himself - falling out of the frame!
The naked legs would trash the intrigue: "What did he see behind her? Why is it so important that even the color is irrelevant?"
I like your concept, with a few "buts," of course. The "model" doesn't look like a model in the jeans. Plus he/she is either leaning, or your horizon is slanted. The bits of stuff in the grass near the model are distracting. I like where you placed the photographer and his position, but I would have either not cropped his head, or I would have cropped more off the right. Mainly, get that model looking like a model and standing straight! As he/she is right now, not terribly compelling...
I like the composition here. The photographer on the ground looks ok, and his subject is crooked. It makes for a neat composition. I like the contrast. I give it a 7.