Demon King Daimaou (Novel) Series by Shoutarou Mizuki

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.

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... more2V, 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...? less

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...