This one, truly made me realize fully that I'm a sadist. The story itself is great, the reasoning of the MC is extremely reasonable, and the people are around the MC really deserved it... About the art, the story is too much that you cannot really focus on the art until you reread it like ten times... The characters are what you can easily judge as the MC judges them, but for the MC, he's really a something else... As a sadist, you could really enjoy this so much, but I wouldn't speak for the pacifist though. Again, a sadist can really enjoy this... Revenge is a good thing, aslong as the revenge is reasonable. And this one proves it.