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!

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...?

THE DAY EVIL TRIUMPHED Mephisto has won. Somehow, he’s broken free of his seal and taken everything Ard ever cared about in an instant. No one can defeat the Evil God—not even the reborn Greatest Demon Lord. However, there’s still a chance. Mephisto will relent if Ard can prove that his bond with his friends is strong enough to resist the devil’s control. But such a feat requires nothing short of a miracle. How will Ard reach out to his friends when everyone’s under the spell of his worst enemy?

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.

Here Comes Trouble...One of Lydia's former soldiers, Sylphy Marheaven, is starting to suspect that this "Ard" character might just be the reincarnated form of the Demon Lord. So when she discovers his whereabouts, she packs her bags and transfers into his academy, dead set on finding out his true identity. And as if Ard's hands aren't full enough, he's got the upcoming school festival to think about, which should be fun...besides Sylphy surveilling him around the clock and the threatening letter he's just received. But, of course, isn't everything a breeze when you're the greatest Demon Lord?

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...