I get what you're saying but as I've posted here before, women wearing stockings don't walk around with the tops of them on show, or at least not deliberately. This only happens in 3D render-world. Professional women from Professors to Prostitutes do not look this way in RL, only the tackiest Strip-O-Grams. It's just a young man's fantasy that has caught on & been given traction by the high number of renders that show it. IMO, it's quite ludicrous, however sexy it might appear.
Now if the stockings on Sophia had been darker with reinforced toes, or fine mesh net, or if they have seam up the back, which we don't know about, that would be different. That would be within the bounds of realism, which I hope this VN never completely loses.