Corporate worker Mikami Satoru is stabbed by a random killer, and is reborn to an alternate world. But he turns out to be reborn a slime! Thrown into this new world with the name Rimuru, he begins his quest to create a world that’s welcoming to all races.

Now that the Jura Tempest Alliance is growing even further, they will now be meeting the animal kingdom of Eurazania, reuniting with King Gazel, rising tensions between monsters and humans, and Rimuru encountering the strongest enemy he’s ever faced.

After Clayman’s defeat, Rimuru returns home and learns that Diablo healed the nobles of Falmuth, securing their alliance with Tempest. Meanwhile, Hinata becomes suspicious of Rimuru’s growing power and confronts him—unaware that a powerful organization is pulling the strings behind the scenes.

Demon Lord Rimuru's dream of creating an alliance between humans and monsters takes a step closer to being realized. As Tempest continues to prosper, Granville Rozzo and his granddaughter, Maribel Rozzo, clash with Demon Lord Rimuru over their plan to protect mankind by ruling over them. Meanwhile, in El Dorado, Demon Lord Leon works toward goals of his own. The awakening of a new Hero draws near!