It's the usually overpowered MC, but with the plot that he kills all the villains. This is a psychologically centered, not explicitly gore at all. The history is not that interesting at all because it's just about killing. The first chapters are fast to read and tell you everything, even if it's not a lot. The characters are just crazy people, so don't expect any talkative or something. Just people dying. In conclusion, I would say that it has potential, not at all about the history but about the art style. If you want to see good designs, a powerful MC, and a lot of blood, itis a must-read.