This... this was the worst, most pointlessly grim-dark plot I've seen outside the realm of middle school Harry Potter fan fiction. The art was equally bad. This whole thing was comically over-the-top, but I don't think it was a joke, and I can't bring myself to laugh in any case. The only reason I even managed to finish it was morbid curiosity and outright shock that such a doujin was ever put to the internet where people can see it.
I'm tempted to look up more from this artist.