The model in the back is excellent and gives a great sense of intrigue. But the bland expression of the model in the front doesn't work for me. Also her lips don't seem as sharp as her eyes.
I love the one eye peering over her head, that really makes the phot unique! The highlights on her lips are great, I do wish the catch light in her eyes was a little stronger to give them more sparkle but overall a pleasing image.
I don't mind a softer focus on portraits but it really makes the image pop if the eyes at least are very sharply focused. Nice concept here. Wonering how it might work with a little less of her chest and a little more of the guy peeking around up top? Good luck.