Overall a great manga. It certainly has a very abrupt and interesting ending, but the ending was fitting in its own way. The manga seems to embody a theme of senseless violence, with bloodbaths coming out of absolutely no where. If you liked other violence centric seinen manga/vns like Gantz, Berserk, Higurashi, and Umineko,then you will most likely enjoy this. I feel like the storyline was very deficient in some places, especially towards the end where some characters just get forgotten, and others just show up dead with no explanation. Even with major issues, I still enjoyed the manga more than most because of the author deciding to just go all out in the ending, even if rushed, and say fuck you to all the readers who wanted a happy ending.