Just finished reading through the second volume; I can definitely tell it was cancelled abruptly, because it sets up major new plot points in the last couple of chapters that are never resolved and then ends on a cliffhanger followed by a "what-if" chapter that sets out one possible ending. Aside from that, it's more of the same edgy dark fantasy action from volume 1 with the intensity and lewdness dialled up even more than before, but yeah.
