What if you were the strongest demon king in history...but nobody believed you? A light-hearted action rom-com series wherein the devil is definitely not getting his due.Anoth, the Demon King of Tyranny, has defeated humans, spirits, and gods alike. But even demon kings get tired of all the fighting sometimes! Hoping for a more peaceful life, Anoth decides to reincarnate himself. When he wakes two thousand years later, though, he finds the world has become too peaceful--his descendants have grown weak and magic is in serious decline. Intending to reclaim his rightful place, he enrolls in Demon King Academy, where he finds that his magical power is off the charts. Literally. And because they can't measure his power, the faculty and other students regard Anoth as a misfit. With the support of Misha, the one student he manages to befriend, the misfit (Demon King) begins his climb up the demon ranks!

Battles for ancient kingdoms are nothing compared to the battles of a classroom! Awakening from magical stasis after a thousand years, the Dark Lord Leonis suddenly finds himself in the body of a ten-year-old boy! He quickly meets Riselia, a girl confronting the Voids, creatures that have nearly exterminated humanity. Determined to uncover the mysteries of this strange new era, Leonis enrolls in Excalibur Academy, a school that trains students to fight back against these enigmatic monsters. Could the Voids hold some connection to Leonis's past?

What if you were the strongest demon king in history...but nobody believed you?Demon King Academy is an elite school with a unique mission: to gather the most powerful students in the land in order to find the one who might be the reincarnated Demon King of Tyranny. Anoth, who actually is the reincarnated Demon King but can't get anyone to believe him, partners with fellow student Misha for an upcoming battle exam. Opposing them is a team led by Misha's elder sister, Sasha, a member of the fearsome "Chaotic Cohort" and a powerful witch who regards them both with nothing but disdain. Though Anoth's own descendants may have branded him a "misfit," now he has the perfect opportunity to show them all just how powerful he truly is!

What if you were the strongest demon king in history...but nobody believed you? Anoth has freed Ivis from possession by the false Demon King, and peace has been restored for the time being... But it doesn’t last for long! New transfer student Rei joins the class at Demon King Academy Delsgade and immediately makes a splash with his superior fighting skills. Rei's swordsmanship may be exceptional, but will it be enough for him to win when he challenges Anoth to a duel? Or is it time for the Demon King of Tyranny to school his fellow student?

When being mediocre is the best-case scenarioAs the most powerful entity of all time, the Demon Lord Varvatos thinks life is a big fat snore. When he takes matters into his own hands and decides to reincarnate, he calibrates his magical strength to be perfectly average. But there is no way he could have predicted that everyone in the modern world would be weak as hell, which means he is totally overpowered once again! Reborn under the name Ard, he has ladies fawning over him, the royal family begging him to become the next king, and an ex-minion insisting on killing him?! But Ard has a one-track mind, and he won’t stop at anything to achieve his ultimate goal!

Tired of ceaseless war destroying humans, spirits, and demons alike, the Demon King of Tyranny, Anos Voldigoad, reincarnates to restore peace. Two thousand years have passed...but who could have known that his descendants’ complacency would cause magic to regress so much? After receiving an invitation to the illustrious Demon King Academy, a school tasked with locating the reincarnated founding ancestor, Anos resolves to enroll, only to discover that his magic is off the charts—literally! With power too great to be measured, the former Demon King is branded a misfit. How will he convince demonkind that the school’s founder stands before them? Thus begins a misfit’s climb to the top of the demon hierarchy!

THE PAST ALWAYS COMES BACK TO HAUNT YOU The end of one adventure marks the beginning of a new one. Ard and Ireena are summoned to serve as the queen’s guards in the holy city of Megatholium. Just when Ard thinks he’s managed to shake off one Heavenly King by leaving the city, another seems to take its place. This time, it’s Lizer, the old general. Apparently, he’s claiming he’s the pope of a religion that worships the Demon Lord…and he intends to brainwash the people to achieve world peace. Ard and Ireena begin to expose his nefarious plan, but it seems the pope has plenty in store to keep them on their toes!