Far in the future, Japan has become a land ruled by magic and those who wield it. Akuto Sai arrives at Constant Magical Academy—the most prestigious magic school in the world—for his first year of high school. The only student to pass the Academy’s intense entrance exam, he has his sights set on become a High Priest, the most powerful and virtuous magician in the land. However, when he arrives at the Academy, his future occupation is prophesied to be… The Demon King?! Now Akuto is the number one target on campus, and he must navigate his way with the help of his friends—a troublesome delinquent, a beautiful observer android, an honor-bound class representative, and a mysterious girl from his past—through the seedy underbelly of the world’s premier magic academy.
Far in the future, Japan has become a land ruled by magic and those who wield it. Akuto Sai arrives at Constant Magical Academy—the most prestigious magic school in the world—for his first year of high school. The only student to pass the Academy’s intense entrance exam, he has his sights set on become a High Priest, the most powerful and virtuous magician in the land. However, when he arrives at the Academy, his future occupation is prophesied to be… The Demon King?! Now Akuto is the number one target on campus, and he must navigate his way with the help of his friends—a troublesome delinquent, a beautiful observer android, an honor-bound class representative, and a mysterious girl from his past—through the seedy underbelly of the world’s premier magic academy.
Ever since the Demon King prophecy, Akuto Sai has had nothing but bad luck. He’s still having trouble controlling his magic, and to make matters worse, he yet again ended up blowing off Junko Hattori’s clothes. While attempting to train his mind through meditation, he finds an ancient treasure map. Not wanting to deal with yet another distraction from his studies, he tries to keep the map a secret, but to no avail. Once the map leaks out, the school breaks out in chaos as the students try to find the lost treasure.
Akuto Sai and his classmates are off on a school seaside retreat, but even here, he cannot escape the looming prediction that he will become the Demon King. The island they travel to has a legend about a hero who will defeat the Demon King... could it be true? And to make things even more complicated, why is the normally cheerful Hiroshi so bitter about his family... and even stranger, why is Korone suddenly trying to seduce Akuto? So much for a quiet, ordinary school life.
Akuto Sai’s life is about to get even more complicated. Junko Hattori invites him to visit her family home, without telling him that the occasion is an arranged marriage meeting — for an arranged marriage between Junko and Akuto! Meanwhile, an assassin comes to Constant Magical Academy, targeting the air-headed Keena, of all people. Who is behind this assassination order? And most importantly... how will Akuto react when he learns of this plot? Prepare to see a darker, angrier Akuto in Volume 4 of Demon King Daimaou!
Akuto has awakened as the Demon King, and has declared that he will kill the gods. Flying on the back of his dragon Peterhausen, he soars into the sky above Constant Magical Academy to face thousands of troops — including Eiko Teruya and his good friend Junko Hattori. He's also opposed by his friend Hiroshi Miwa who, unbeknownst to the world, is secretly the anti-magical supersuit-wearing hero known as "Brave." Akuto has Fujiko and his horde of demon beasts on his side, but will it be enough? Meanwhile, Keena seems to hold the key to Boichiro's appearance, and to the greatest mystery of all: the future of humanity.
Constant Magical Academy has a new transfer student named Keina Doronz. Not only does she have almost the same name as Akuto's friend Keena, but she also has an identical bird-shaped hairpiece — the same one that Akuto bought for a crying girl when he was a child. Who's the real girl from his memory? To make things more confusing, this unknown girl is demanding that Akuto take her on a date! Hilarity and magic school shenanigans ensue when Keina joins Keena, Junko, Korone, and Fujiko as they circle around our favorite hapless Demon King, Akuto Sai.
2V has come up with a plan to kill Akuto using virtual phase space, and he recruits the teenage genius scientist Yoshie Kita to help. Akuto and the rest of the school are sealed in a game of Yoshie's creation, and to make it out, he'll have to play the role of the Demon King and battle against the other students. But there is another secret hidden inside the game that breaks all the rules...
2V, with the newly-awakened First Demon King, Zero, has successfully taken over the Empire. All Liradans, including Korone, are under her control. And with Akuto out of commission and no one allowed to use magic, no one can stop her from commanding every aspect of the citizen's lives. What is 2V's true goal behind creating this Liradan-centered, magicless society? Meanwhile, the injured Akuto has taken refuge in a black mage village with Fujiko, Keena, and Yoshie. What will he do when he meets someone who holds the secret to his mysterious birth...?
Empress Kazuko, after killing her sister 2V, is revealed to be the true villain. Using the power of Zero, the First Demon King, she intends to enslave humanity. In order to save everyone, Akuto knows that the line of Demon Kings must end — and for that to happen, both he and Zero must die. Will Akuto and Brave be able to defeat Kazuko and Zero? Will Junko, Keena, and the others survive this battle? And what does the member of CMID-8, "USD," have to do with all this? Read the epic climax of the war between Demon Kings!
New empress Keena causes chaos in the school with an order to create a rice renaissance?! Yoshie, who's now hanging around at school for some reason, invents something terrifying! What could it be? What happens to the trio when they run away from Lily? Nozomi Sasahara, a new character who's the only daughter of a Japanese inn, causes all kind of chaos in a series of short stories in volume 10!
Shocking truths are revealed now that Keena has become Empress. What is the Empire? What is the world? What secret power is given only to the royal family? A beautiful girl from the jungle and a prince from an undersea city both appear, staking claim to the throne, only for CIMO8's own plot to cross paths. When the Empire faces its greatest peril, Akuto's power is unleashed once more!
Marine’s use of the Faceless Power only worsens the war between the Empire and the Republic. But this was only the beginning of The One’s plan. Will Akuto’s rage at losing Junko be enough to save the world? What is this power that comes from outer space? And what is “The Fictional Nature of the World”?
The Earth has been destroyed by a meteor from outer space. In the afterlife, Akuto and the heroines find a recreation of the world as it was before he became demon king. However, in this world, Liradans do not exist, and the demon king is a distant memory. What is the true nature of the “story” invading peoples’ minds? The final chapter of the series approaches the truth...