Kageyama Kai, a lonely 17-year-old bookworm, finds solace in fantasy novels—especially one about a brave hero named Alice Ashglade, who fights demons to avenge her slain family. But his world literally changed when he was hit by a car.
After reading so many fantasy stories, he thought that maybe he, too, would be reincarnated into a magical world and embark on an exciting journey to defeat the Demon King. Well, he was partly right.

“A-Alice?!”
“Don’t you dare utter my name, new Demon King.”

Trapped in the role of the new Demon King, will Kai rewrite a destiny forged in vengeance—or is he doomed to die at the hands of his favorite character?