【Manga Adaptation Ongoing】

Tio, a young knight, had been journeying alongside the Female Hero on a quest to save the world. However, one day, he is cast out of the party due to his perceived lack of skill.

On the night of his expulsion, Tio has a dream: a vision of a Mage King from centuries past, who, wielding dark magic, utterly overwhelmed the Demon God that had driven humanity to the brink of extinction. Tio remembers: that Mage King was none other than his past self. He also recalls that dark mages—a profession scoffed at as bottom-tier in the modern era—can become the strongest class when perfected through a unique method only he knows.

With his memories restored, Tio undergoes a class change from knight to dark mage, and comes to be hailed as 'The Strongest'――.

※Also available on Kakuyomu.