Obey Me!

Alone in his room, third-born Leviathan lets his inner cosplayer loose as he puts on a one-man show dressed as his favorite character Ruri Hana from "The Magical Ruri Hana: Demon Girl." However, when his younger brothers have little care for boundaries, Leviathan must hide his cosplay as sixth-born Beelzebub and seventh-born Belphegor come unexpectedly barging in.

The brothers are at the private beach of Lord Diavolo, the only son of the Demon King (Levi isn't much of an outdoor type so he is absent). The ever-so-poor Mammon secretly tries to carry out his plan, which is to take a shirtless photo of Lucifer and sell it to Lucifer's fans at RAD. However, his opponent is a tough one! With no openings, there are no photo opportunities. Mammon has had it and comes up with a final plan. Will he succeed?

In a desolate land oddly reminiscent of a JRPG, the final boss Beelzebub sits upon a throne with his captive, Princess Asmo, by his side. To save the princess, three adventurers, Leviathan the Hero, Satan the Warrior, and Belphegor the Mage, confront Beelzebub. But when the mighty Leviathan slays Beelzebub with one swing, the adventurers don't receive the reaction they were expecting.

It seems as if Satan has been reading too many detective novels. Springing into action, Detective Satan begins solving mysteries left, right and center — that is until catching the perpetrator of one crime proves nearly unthinkable.