One and a half decades ago, 70% of the moon was destroyed by a villain. Every hero of the world failed in front of his speed and intellect. A year later, Japan and every other country killed him in a joint mega-ass...

It's been 100 years since the end of the Great Tenma War, and Rimuru was doing his paperwork. To kill his boredom, he decided to visit his old world. But instead of seeing a normal human world, he sees Hunters, Dun...