They called him a failure. In an academy overflowing with legendary heroes who saved entire dimensions, Kujou Kyouya was the bottom of the barrel. Without a single unique skill from the goddess, he failed his world and became a punchline for the elite. But what the world didn't know was that Kyouya was serving a sentence far more grueling than any hero could imagine. He spent thirty thousand years in the depths of another world, forged in the fires of the most evil demon king in existence, Felice. Having survived the tutelage of a monster who annihilated thousands of worlds, Kyouya has returned with a power that defies the system itself. He does not need a blessing when he has become the curse that the strongest heroes fear. The era of the failed hero is over, and the legend of the ultimate powerhouse begins.

action, fantasy, overpowered, shonen, returner, demon king, magic, martial arts, adventure, revenge