My Instant Death Ability Is So Overpowered, No One in This Other World Stands a Chance Against Me! —AO—

Having finally made it out of the tower, Yogiri and Tomochika are greeted with an apocalyptic scene—or at least, it would have been, if not for Yogiri accidentally killing the Dark God who’d been trapped there. Despite the flawless execution of the goddess Vahanato’s plans, they amounted to nothing more than releasing her lover’s corpse from its imprisonment. After a quick visit from the Hedgehog and brief encounter with the Dark God’s surviving spawn, Yogiri and Tomochika are finally able to resume their journey to the capital. Meanwhile, with the disappearance of yet another Sage, Sion is finally beginning to realize just how much of a threat Yogiri is to their world.

With the events of the tower behind them, Yogiri and Tomochika begin making their way through the Meld Plains, a foggy expanse of crystalline plants and animals, towards the capital, in hopes of reuniting with the classmates who left them for dead on the bus. After dealing with a short distraction on the plains, they manage to make it to the city but find that getting permission to enter may be a bit more complicated than they had first hoped. Meanwhile, another member of the class who had been abandoned wakes up in the ruins of their tour bus. Disoriented and critically wounded, she finds she is not quite as alone as she thought, and Yogiri left behind just the thing she needs to treat her wounds.

Yogiri and Tomochika are finally reunited with their classmates as they make it to the capital of Manii. But before they have time to even say hello, they find the class already burdened with a new task: to accomplish a great feat that would gain them recognition as potential Sages. As the two try their best to blend in and smooth over the rough feelings from their previous abandonment on the bus, the class begins making plans to take on the Underworld, a labyrinthine dungeon below the capital, housing a Dark God they must slay to prove themselves worthy as Sage candidates. Meanwhile, another estranged classmate makes her return, but with far more sinister intentions.

While the class begins to make steady progress on clearing the Underworld—the great feat they have chosen for their attempt to become Sages—not everything is going smoothly. Ayaka Shinozaki, a classmate long thought dead, has reappeared in the city and is hunting down members of the class one by one as revenge for abandoning her back on the bus. At the same time, a mysterious organization has once again begun targeting Yogiri, making attempts on his life every time he leaves the castle. And just when the class thinks they’ve tracked down the culprit, a ghost from Yogiri’s own past enters the stage, throwing even our calm and collected protagonist into a state of shock.

Upon reaching the capital, Hanakawa and Lute quickly make their way down to the Underworld to free Albagarma’s younger sister in hopes that she’ll take revenge on Yogiri. At the same time, Ayaka’s own revenge plot has been wreaking havoc across the city, and as it claims even the king’s life, the Sage candidates find themselves politely expelled from the palace. Hoping to kill two birds with one stone—to destroy the Dark God and put a stop to Ayaka’s rampage—the class of Sage candidates heads as a group into the Underworld.