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The thousand-year struggle had finally come to an end.
Under the blazing sun, the source of all demons—Demon King Muzan—was reduced to ashes.
The victors of this final battle were none other than the Demon Slayer Corps.
And at that moment—
"Wooooaaah!"
"We did it! We actually won!"
"The Demon Slayer Corps has finally defeated Muzan Kibutsuji! Humanity's ultimate victory!"
"This is a triumph for mankind itself—the demons are gone for good!"
"Tanjiro and the others are heroes—no question about it!"
"Their deeds will be remembered for generations, immortalized in history!"
The cheers of countless worlds resounded through the heavens.
"What a bunch of adorable kids!"
In the world of pirates, Marine hero Garp wiped tears from his eyes with a grin.
But even this hard-won victory came at a terrible cost.
Many demon slayers had fallen. Even among the elite Hashira, losses were devastating.
The Stone Hashira Gyomei Himejima, the Serpent Hashira Obanai Iguro, and the Love Hashira Mitsuri Kanroji—all perished in battle.
Only two Hashira survived: the Water Hashira Giyu Tomioka and the Wind Hashira Sanemi Shinazugawa.
And then there was Tanjiro…
"They may be gone," said Vice Admiral Tsuru from the Marines' world, "but their spirits will live on and inspire the next generation of heroes. The world will be better for it."
"My precious Mitsuri-chan… she's gone too!"
Sanji sobbed uncontrollably in the Straw Hat crew's galley.
"Incredible… Tanjiro, you're amazing."
Gon's eyes filled with tears in the Hunter world.
"Their bravery will be engraved in people's hearts for centuries to come,"
Reborn murmured softly from the Hitman Reborn world.
"Is it over already? I haven't even secured my immortality material!"
Orochimaru, in the Naruto world, slammed his test tubes in frustration.
Then—
"Wait—what's happening? Tanjiro's eyes… they're just like Muzan's!"
In the Mushoku Tensei world, Rudeus's pupils contracted sharply.
"Ah—ahhhh! Tanjiro… Tanjiro's turned into a demon!"
Kazuma from Konosuba shouted in horror.
"It's Muzan! He must have done this before dying—he turned Tanjiro into a demon! No, not just any demon… the new Demon King!"
Subaru from Re:Zero yelled in disbelief.
"This can't be happening!"
"It's too cruel!"
"Everyone's already on the brink of death!"
"Tanjiro's even overcome sunlight?!"
"Neither sunlight nor the Nichirin blades work on him—who can stop him now?!"
"To think that comrades who just fought side by side must now kill each other…"
"What a cruel twist of fate!"
Across all worlds, the cheers froze into stunned silence.
...
Demon Slayer World — The Infinite Castle
"Hehehe…"
Muzan's cold laughter echoed faintly.
Just moments ago, he had raged at his own destruction.
But seeing Tanjiro standing unscathed under the sun—his successor—Muzan's mood improved considerably.
So this was his legacy: a new Demon King to carry on his will and slaughter the Demon Slayer Corps.
...
Demon Slayer Corps Headquarters
"You've gotta be kidding me! Tanjiro's the Demon King now?! And he's not even afraid of sunlight! No way—Tanjiro, wake up!"
Inosuke screamed, panic in his voice.
Just a second ago, they were celebrating.
Now, a brutal reality struck like a thunderbolt.
"No, Nezuko—don't go! He'll kill you! Tanjiro, that's your sister, Nezuko!"
Zenitsu was bawling his eyes out.
"H-how… how could this happen? I—I became a demon? I'd rather die than live like that!"
Tanjiro's body trembled violently.
"At this point, all we can do is believe!"
Rengoku's familiar, fiery voice boomed through the chaos.
"If it's Tanjiro, he'll be okay!"
Kagaya Ubuyashiki nodded firmly.
"I believe in him too!"
"So do I!"
Mitsuri Kanroji's spirit smiled through her tears.
"Mm!"
Nezuko nodded hard, eyes brimming with hope.
"Everyone…"
Tears welled in Tanjiro's eyes.
"I won't… lose to this!"
Under the watchful eyes of countless worlds—
Tanjiro fought back.
Nezuko's voice called to him.
Kanao's medicine took effect.
The love and faith of his friends gave him strength.
And at last—Tanjiro overcame Muzan's power.
He was human again.
At that moment, cheers erupted once more across the multiverse.
"He really did it… Tanjiro actually came back!"
Conan wiped the sweat off his brow.
"Hey, Haibara, if they could make an antidote for demonization back in Tanjiro's time, what's your excuse?"
Haibara just gave him a flat look—the kind reserved for idiots.
"Alright! To celebrate Tanjiro and the Demon Slayer Corps' victory—everything's on the house tonight!"
In the world of Gintama, a silver-haired man with a natural perm shouted proudly, instantly riling up the bar's crowd.
"Gintoki, you can't just decide that for someone else's bar!"
Shinmura Tae exploded in anger.
...
Naruto's world
"Man, having friends is awesome! When you've got people like that backing you up, you can overcome anything!"
Naruto's eyes sparkled with admiration.
...
One Piece world
"Shishishishi~"
Luffy laughed on the Sunny's deck.
"Phew, it's finally over. My poor heart can't take much more of that!"
Usopp collapsed, exhausted.
"No… it's not over yet."
Robin raised an eyebrow mysteriously.
[The deeds of heroes must be remembered.]
[Their struggles and sacrifices deserve reward.]
[And now begins the heroes' reward ceremony.]
The scene shifted.
The camera panned to the Demon Slayer Corps headquarters once again—
Where the exhausted yet unbroken heroes stood, their images shining brightly across all worlds.
"..."
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