Turning against his former allies and enemies alike, Eren Yeager sets a disastrous plan in motion. Under the guidance of the Beast Titan, Zeke, Eren takes extreme measures to end the ancient conflict between Marley and Eldia—but his true intentions remain a mystery. Delving deep into his family's past, Eren fights to control his own destiny.

Meanwhile, the long-feuding nations of Marley and Eldia utilize both soldiers and Titans in a brutal race to eliminate the other. Reiner Braun uses his own powers in a desperate bid to hold off Eren's own militaristic force, and his fellow Eldians—children Falco Grice and Gabi Braun—struggle to survive in the unfolding chaos.

Elsewhere, Eren's childhood friends Mikasa Ackerman and Armin Arlert remain imprisoned alongside Eren's former Survey Corps companions, all disturbed by Eren's monstrous transformation. Under the blind belief that Eren still secretly harbors good intentions, Mikasa and the others enter the fray in an attempt to save their friend's very soul.

The devastation of the Mugen Train incident still weighs heavily on the members of the Demon Slayer Corps. Despite being given time to recover, life must go on, as the wicked never sleep: a vicious demon is terrorizing the alluring women of the Yoshiwara Entertainment District. The Sound Hashira, Tengen Uzui, and his three wives are on the case. However, when he soon loses contact with his spouses, Tengen fears the worst and enlists the help of Tanjirou Kamado, Zenitsu Agatsuma, and Inosuke Hashibira to infiltrate the district's most prominent houses and locate the depraved Upper Rank Demon.

The year is 20XX. The ninja, who once forged the history of Japan, were scattered across the country during the Meiji Restoration. As these ninja mingled with the other clans, their bloodline thinned, and they gradually faded from sight. The descendants of these ninja clans, seeking to preserve their heritage, formed the WNA (World Ninja Association) in the hope of carrying on their legacy.

And so it was that the WNA succeeded in developing Ninja-Gum, an art which could summon forth the strength of the Shinobi. And yet creating the most powerful Ninja-Gum requires the strongest of ninja DNA. So it was that the Ninjala Tournament was held, that the mightiest of all ninjas could be found…

(Source: Official Game website)