That Time I Got Reincarnated as a Slime Season 4

Demon Lord Rimuru moves one step closer to his vision of uniting humans and monsters. As Tempest continues to flourish, Granville Rozzo and his granddaughter, Maribel, come into conflict with Rimuru, driven by their belief that humanity must be protected through control and domination. Meanwhile, in El Dorado, Demon Lord Leon quietly pursues his own ambitions. And as tensions rise, the awakening of a new Hero draws ever closer.