The night before the Opening Festival, Rimuru throws a lavish banquet for all the nobles and royalty visiting Tempest. When the party is in full swing, Empress Elmesia of the Sorcerous Dynasty of Thalion arrives, throwing everyone into chaos.

The second day of the National Foundation Festival dawns, bringing with it the main round of the battle tournament. The fighters face off and give it their all—except for one, which causes Rimuru concern.