Corporate worker Mikami is stabbed by a random killer, is reborn to an alternate world. But he is reborn as a slime. He is Thrown into this new world with the name Rimuru, he begins his quest to create a world that's welcoming to all races

A long-running conspiracy is swirling over a mysterious power wielded by the Queen in Raja, a small country west of Tempest. When a slime who evolved into a Demon Lord named Rimuru Tempest crosses paths with Hiiro, a survivor of the Ogre race, an incredible adventure packed with new characters begins. The power of bonds will be put to the test.