I agree, I had to re read a few pages to get it. And though I've never read the original, I really like this doujin. (I try not to read doujinshi's if I haven't read the original yet).
Hows they get it into that condition with that scan quality? That was the most interesting thing to me(the example page of before and after) makes me curious about other before and afters from our current "scantalators"