In the far future, humans abandon a devastated Earth and traveled to outer space. However, due to unknown phenomenon that prevents them from traveling into space, humanity returns to Earth only to find it inhospitable except for Japan. To accommodate the entire human population, pocket dimensions are created around Japan to house in the populace. In order to find a way to return to outer space, the humans began reenacting human history according to the Holy book Testament. But in the year 1413 of the Testament Era, the nations of the pocket dimensions invade and conquer Japan, dividing the territory into feudal fiefdoms and forcing the original inhabitants of Japan to leave. It is now the year 1648 of the Testament Era, the refugees of Japan now live in the city ship Musashi, where it constantly travels around Japan while being watched by the Testament Union, the authority that runs the re-enactment of history. However, rumors of an apocalypse and war begin to spread when the Testament stops revealing what happens next after 1648. Taking advantage of this situation, Toori Aoi, head of Musashi Ariadust Academy's Supreme Federation and President of the student council, leads his fellow classmates to use this opportunity to regain their homeland. (Source: Wikipedia)

When it comes to the fantasy MMORPG Cross Reverie, none can match the power of the Demon King Diablo. Possessing the game's rarest artifacts and an unrivaled player level, he overpowers all foolish enough to confront him. But despite his fearsome reputation, Diablo's true identity is Takuma Sakamoto, a shut-in gamer devoid of any social skills. Defeating hopeless challengers day by day, Takuma cares about nothing else but his virtual life—that is, until a summoning spell suddenly transports him to another world where he has Diablo's appearance! In this new world resembling his favorite game, Takuma is greeted by the two girls who summoned him: Rem Galeu, a petite Pantherian adventurer, and Shera L. Greenwood, a busty Elf summoner. They perform an Enslavement Ritual in an attempt to subjugate him, but the spell backfires and causes them to become his slaves instead. With the situation now becoming more awkward than ever, Takuma decides to accompany the girls in finding a way to unbind their contract while learning to adapt to his new existence as the menacing Demon King. [Written by MAL Rewrite]

Hell is a bureaucracy, and business is running smoother than ever thanks to the demonic efficiency of Hoozuki, chief deputy to Lord Enma, the King of Hell. Whether offering counsel to the Momotarou of Japanese folklore or receiving diplomatic missions from the Judeo-Christian Hell, the demon who runs the show from behind the king's imposing shadow is ready to beat down any challenges coming his way into a bloody pulp. Metaphorically, of course... The poster boy for micromanagement and armed with negotiation skills worthy of Wall Street, Hoozuki no Reitetsu follows the sadistic and level-headed Hoozuki as he spends his days troubleshooting hell. With an abundance of familiar faces from popular Japanese legends and East Asian mythology working middle management positions, this referential and anachronistic dark comedy brings new meaning to the phrase "employer liability." Just how hard could it be to manage employees from hell, anyway? [Written by MAL Rewrite]

Just as in this life, the afterlife needs a calm troubleshooter to deal with the bureaucratic headaches that come from keeping things in order. Enter Hozuki: a cool and collected demon who’s badly in need of a vacation. (Source: HIDIVE)