Ultimate Antihero is a light novel series written by Riku Misora (also known for Chivalry of a Failed Knight) and illustrated by Nardack.
About a hundred years ago, Earth was attacked by demons, beings from an alternate dimension that could wield magical powers beyond humanity's ability to handle. As demons quickly proved to be immune to conventional weapons, humanity quickly found themselves losing, until a mysterious man entrusted to humanity his knowledge of sorcery in the form a single book, the grimoire Liber Al vel Legis (the Book of the Law). Through the sacrifice of the lives and minds of many people, humanity managed to decipher a small part of the book and learned the secrets of magic, allowing them to fight back against demons.
Even so, the appearence of the Demon King class demon Typhon almost spelled doom for humanity as most of the world's countries were destroyed in a span of merely ten days. It was then that a young boy, 12-year-old Homura Kamishiro managed to completely decipher the Liber Legis and thus obtained the power to control Evil Gods, which allowed him to defeat Typhon.However, the few remaining governments feared the boy's overwhelming power, and branded him a traitor forcing him to go on the run. The boy spent several years ostracized by most humans, but one day he suddenly received an invitation from one of his remaining acquaintances, asking him to come to Tokyo's Sorcery Academy.
This story provides examples of:
- After the End: By the time Typhon was defeated, there wasn't much left of civilization.
- Child Prodigy: Homura was 12 when he completely deciphered the Liber Legis and defeated Typhon.
- The Dreaded: Most of humanity fears and hates Homura for his powers.
- Summon Bigger Fish: Homura defeats the Demon King class monster Jambure by summoning Ithaqua.
- Ungrateful Bastard: As a "reward" for saving what remained of the world, Homura was branded as a traitor and basically exiled from society by the leaders of the New World Government, who also forced him to wear a seal that restrains him to a mere fraction of his full power.