Wow, just wow! This look amazing, I can't even fully comprehend how you achieved this in Paint. All the details, variable line width, shading.
The only thing that saddens me is shading on the panties. For whatever reason you thought it would be more realistic to emphasize genital area and keep the rating at E.
I don't really mind the rating, but the fact your art took on a slightly perverted direction .. just saddens me.