That Time I Got Reincarnated as a Slime Season 4

Rimuru's dream is finally taking shape! With the Founder's Festival behind them and diplomatic ties formed across the land, the Jura-Tempest Federation now sets its sights on something much bigger — a world where humans and monsters can genuinely live side by side as equals, the Human-Monster Coexistence Sphere.

Tempest keeps growing stronger by welcoming every race with open arms, and that unity is turning into real power. But not everyone is thrilled to see a Demon Lord rise this fast. Granbell Rosso, a former Hero and head of the Five Elders of Siltrosso, along with his granddaughter Mariabell, aren't willing to let Rimuru's vision go unchallenged.

Meanwhile, over in El Dorado, Demon Lord Leon is quietly working toward plans of his own, and whispers of a new Hero awakening are starting to spread. Season 4 promises bigger politics, bigger battles, and the same warm found-family charm that made Tempest a home worth protecting.