Mairimashita! Iruma-kun Season 2 Episode 21 English Subbed Episode Title:The One Who Rules Over the Netherworld.Episode Description:Iruma finishes the extra homework assigned by Kalego for losing the Walter park competition. Sullivan and Opera take him shopping and while buying books Sullivan purchases a copy of prophecies about the Demon King. Many people wonder why Sullivan still hasn’t taken the throne so Iruma asks about the Demon King. Sullivan remembers how Derkila, the now missing Demon King, was a lot like Iruma. Sullivan explains about the Thirteen Crowns, the leaders of the Netherworld like Sullivan. To become Demon King requires the support of all thirteen, but it is a heavy responsibility as the Demon King is the Netherworld itself and his power over it is absolute and can remake it any way they see fit, explaining current Netherworld society is simply the way Derkila wished it to be...