Welcome to Demon School! Iruma-kun 23

The Dinner of the Thirteen Crowns Returns!! Iruma’s promotion to rank 5 (He) means he must now take on important new ­responsibilities. To add to his plate, he receives an invitation to a banquet where the greatest demons of the netherworld gather—the Dinner of the Thirteen Crowns! But why does his grandfather Sullivan then bring up “demon king contenders,” and what does that even mean?!