Everything about it looks "off". The anatomy is godawful, the photo background is grainy as hell, the lazy photoshop brush lace pattern on the stockings clashes with everything, and the coloring says "I learned everything I know about shading from a couple tutorials I found on DeviantArt". This is a typical example of shit-tier amateur-hour hentai.
It's baffling that people waste their time uploading this sort of trash to Danbooru in the first place, because anyone who's spent more than five minutes on this site knows that nothing as bad as this ever gets approved. Frankly, I'm surprised that it's lasted this long without a moderator foregoing the usual process and just summarily deleting it.
