It's been a long time since I first saw this Hentai. It was one of the first and the first one I took realy interest in the story.
Unlike it's predecessor, this "piece of art" tells a more end-time, apocalyptic story, which suits the baseline pretty well. The Characters are realy affraid of losing their mind but still try to make the best out of their time left.
To be honest, if i realy want to make a virus which wipes out all of humanity, this woud be the line up it has to have.
all in all, it's worth watching !