Demon Lord Rimuru’s dream of a world where humans and monsters coexist has now come close to reality. Rimuru’s city, “Tempest,” is progressing day by day, but new enemies have emerged. Granville Rozzo and his granddaughter, Maribel Rozzo, are becoming a thorn in Rimuru’s path. They believe that there is only one way to save humanity—to rule over them, and this is precisely what confronts Rimuru.
On the other hand, in El Dorado, Demon Lord Leon is pursuing an old goal of his own. Amidst all this, the time for the awakening of a new “Hero” is also coming closer!