Rising from the depths of despair, this is a fantasy about persistence. Church of the Three Heroes vs. Four Holy Heroes! Can Naofumi protect Raphtalia, Filo, and the world? What is the mysterious high priest aiming at? From despair, Naofumi chooses an evil path. The flames of the curse series will burn!

At a critical moment, Naofumi and the others are saved by a young girl. Ost’s sacrifice is enough to save them from their battle to the death with Kyo, but Kyo's able to escape to another world. Naofumi attempts to follow him, but he awakens to find himself in prison! His friends are scattered and he finds himself back at level one. How will Naofumi survive the new challenges that await him?

“Did he really just start a wave?!” Naofumi and his party have arrived at Kyo’s research laboratory. There, they discover countless homunculi, created as vessels for souls. Controlling the body of the mirror hero, Kyo attacks our heroes—and even has another deadlier weapon up his sleeve.

Naofumi Iwatani, an uncharismatic Otaku who spends his days on games and manga, suddenly finds himself summoned to a parallel universe! He discovers he is one of four heroes equipped with legendary weapons and tasked with saving the world from its prophesied destruction. As the Shield Hero, the weakest of the heroes, all is not as it seems. Naofumi is soon alone, penniless, and betrayed. With no one to turn to, and nowhere to run, he is left with only his shield. Now, Naofumi must rise to become the legendary Shield Hero and save the world!

"If you refuse to fight, I'll have to kill you all." Naofumi and his friends meet Fitoria, the queen of the filolials. But in order to fulfill her own objectives, Fitoria challenges Filo to battle! What's more, the Spear Hero, Motoyasu, utters something absolutely shocking. In the midst of despair, when all seems lost, what will Naofumi do?

“I wasn’t expecting you to be in cahoots with the queen, that’s for sure.” Having defeated Kyo and left Kizuna and the others behind, Naofumi and his friends return to Melromarc. The Spirit Tortoise has left a deep scar on the world’s nations, including their own Melromarc. Now with the objective of preparing for future struggles against the waves and the deadly Phoenix, for some reason Naofumi heads straight to the slave trader?!

After traveling to Faubrey to meet the country’s seven star hero, Naofumi finds himself faced with Takt, the Whip Hero. It was this same Takt, along with his disdainful attitude, that ultimately caused the death of Atla in the battle against the Phoenix. Fueled by rage, Naofumi tries to fight Takt, but Takt steals the shield that Naofumi thought was permanently attached to his arm. With his defenses weakened, Naofumi suffers a critical injury and finds himself in a mysterious, unfamiliar world. There, he finds a reassuring ally waiting for him. But once again, Naofumi is forced to make an impossibly difficult decision. “It really was more baggage than anyone should be forced to carry. But actually, I couldn’t say I minded.” Naofumi’s rise to glory continues in volume sixteen of this otherworldly fantasy!