I like the concept.
Just try modify few things ok?
1- Border try make it abit thicker and towards the bkg interception, make it like grainy.
2- the white behind y2j's shoulder looks odd to me. Try make it as a light source behind y2j instead (which will not only be having the shoulder area, but also the diaphragm).
3- Try mix the psd with the bkg abit. Select one or two areas of the psd and blend it with the bkg to give the mix feeling and you will convince us about your work more.
4- Try mixing the brushes of the bkg. You used like one main 600px sized brush for the bkg? just guessing. Try blend another brush or atleast mirror the brush on another layer, to give it more "life".
Hope those are useful.