An ordinary salaryman is recruited by the Demon King to become one of his Four Heavenly Kings in another world–what could possibly go wrong?! Uchimura Denosuke is your normal, everyday salaryman trying to climb the corporate ladder. But then he’s summoned to a terrifying fantasy world by the Demon Overlord, who offers him a new job—as one of the Heavenly Kings in his army, with full benefits! Uchimura may not have muscles or magic, but he does have an office worker’s skills and savvy. Will they be enough to keep him alive?

The mighty Demon Army is facing a ferocious wyvern attack! But the true threat comes from deep divisions that are splintering the army. It's up to Uchimura, a human recruited into the Demon Army's Big Four, to use his office skills to heal the divisions and unite the Demon Army against this calamity.

When Uchimura Denosuke agreed to take a job in the Demon Overlord's army, he passed his first test with flying colors--despite being a normal human. But when his new boss asks him to resolve a magical dilemma, Uchimura's office skills may not be enough. Can an ordinary salaryman keep up with the demands of being a Heavenly King?

Embark on an adventure filled with dreams, desires, and epic battles surrounding the mysterious Sword of Cortés, a mystical weapon said to grant the wishes of whomever holds it. Throughout history, this powerful sword has allegedly been responsible for many bouts of good fortune ― and unimaginable tragedies. With no crew at his command, Jack Sparrow sets off on his own to make a name for himself and take the legendary sword and scabbard of Cortés!

In this manga adaptation of the popular web novel series, an overworked wage slave finds himself transported to a fantasy world where he quickly becomes the strongest sage in the world...thanks to the help of an army of tamed slimes! Whether at the office or at home, corporate drone Yuji Sano works all the time. So when his home PC flashes a message about him being summoned to another world, Yuji restarts his machine...only to find that he's inadvertently accepted the summons! Now in a fantasy world far removed from paperwork and computers, Yuji has just one thing on his mind: waking up from what he thinks is a dream and getting back to the mountain of work he left behind! But this other world has other plans for Yuji, who quickly discovers his Monster Tamer character class allows him to befriend slimes! And thanks to their number, those slimes help him absorb so much magical knowledge that he gains a second character class in the blink of an eye! How will Yuji wield his power now that he's the greatest sage the realm has ever known?! And what about all that paperwork?!

Salaryman-turned-heavenly king Uchimura leads the Demon Army against a horde of invading wyverns. The army struggles valiantly but is overwhelmed by the appearance of a titanic dragon—that is, until the Demon Overlord arrives. After dealing with this threat, the Demon Overlord makes the following unexpected announcement: “You, Uchimura, shall become the next king of the Demon Army!!”While striving to deal with this unexpected promotion, Uchimura heads to his next mission, where he faces a new, severe problem.

Uchimura embarks on a perilous journey with a small band of the Demon Kingdom's finest warriors to rescue Ulmandra, who's been kidnapped. They attempt to infiltrate the castle disguised as a traveling group of merchants. Their plan is quickly thwarted, though, by non other than Ulmandra's kidnapper--the dreadful Van! "He'll come to us." In dire straits, Uchimura comes up with a peculiar plan that just might be crazy enough to work!

To stop the vile tyrant Buzzan from forcing Ulmandra to be his bride, Uchimura teams up with Ulmandra's older brother, Vahn. They infiltrate the wedding, but Vahn's attempt to assassinate Buzzan takes an unexpected turn. Angered by Vahn's betrayal, Buzzan calls for his execution. Will Vahn's carefully laid plan for revenge and his faith in Uchimura pay off? Or will it all come crashing down with the sudden appearance of a deadly new Calamity in Kuryuu?

Uchimura Denosuke is your normal, everyday salaryman trying to climb the corporate ladder. But then he's summoned to a terrifying fantasy world by the Demon Overlord, who offers him a new job--as one of the Heavenly Kings in his army, with full benefits! Uchimura may not have muscles or magic, but he does have an office worker's skills and savvy. Will they be enough to keep him alive?

Uchimura tried to negotiate a deal with the Merchant's Guild to solve the post-calamity food shortage, but his attempts were all foiled by the wicked Viper and his tricks. Determined to turn the tables, Uchimura pulls out the aces up his sleeve: a former enemy and a frail young girl with the courage to come forward with the truth. "By the power invested in me as a Heavenly King for the Demon Army, you're under arrest." Viper finally faces the hammer of justice--only for the Demon Army to find itself in a new and unexpected bind!