Deep inside Raja's underground super-secret, super-overpowered, absolutely ridiculous lab, a small, white-haired demon child woke up screaming.
"LET ME OUT!!!" Rui shrieked, thrashing wildly against enchanted chains that glowed with ancient runes. His spiderweb abilities were gone, his connection to Muzan severed, and worst of all—there were no aesthetic spiderweb curtains in his cell.
Raja, standing outside the enchanted prison with a coffee mug that read 'SCIENCE RULES, DEMONS DROOL', took a slow sip and sighed.
"Wow. You're loud for someone who just woke up from a demon-beating coma."
Rui glared, his fangs bared. "What have you done to me, you filthy human?!"
Raja smirked. "Oh, nothing much. Just kidnapped you, stuffed you in a magic box, teleported you here, and removed your Wi-Fi connection to Daddy Muzan."
Rui blinked. "…What?"
"You're officially off the Muzan Network, kiddo. No more 'Demon Netflix' for you." Raja waggled his eyebrows. "Welcome to the realm of unpaid experiments! Hope you survive!"
For the next week, Raja and Tamayo ignored everything else in life except their crazy experiments to turn Rui back into a human.
Meanwhile, somewhere across Japan…
Muzan Kibutsuji, Lord of All Evil, suddenly choked on his tea.
"WHY DO I FEEL LIKE I'VE LOST A CHILD?! WHICH ONE OF YOU DISAPPOINTMENTS DIED?!" he roared at his Kizuki subordinates, smashing the nearest table.
The demons trembled, "M-Master Muzan, w-we don't know…"
Muzan's face twisted in rage. "WHO KEEPS KILLING MY DEMONS?!"
Meanwhile, back at the lab…
Raja was casually spinning vials of blood in a test tube, grinning. "Heh. Somewhere out there, Muzan's having an aneurysm."
Tamayo gave him a judgmental mom-look. "Raja, can you please focus? We're making history here!"
Raja rolled his eyes. "Ugh, fine. No fun allowed in SCIENCE, I guess."
After a week of testing, burning things, and ignoring Yushiro's dramatic complaints, Raja finally cracked the code.
"HAHAHA! IT WORKS!" Raja cackled, holding up a glowing blue vaccine.
Tamayo's eyes widened. "Are you sure?"
"Tamayo-san, my genius is beyond your comprehension."
"That's… not reassuring."
Ignoring her concerns, Raja stabbed Rui with the vaccine.
Cue instant, dramatic pain.
Rui's body convulsed, his eyes rolling back as black blood BURST from his veins.
"AAAAAAAAAAAAAAAAGGGGHHHHHHH!!!!" Rui screamed like a banshee, flopping like a fish out of water.
Tamayo winced. "That… does not look comfortable."
Raja shrugged. "Eh. Science."
Muzan, wherever he was, probably felt that scream in his SOUL.
After a week in a coma, Rui finally woke up.
Instead of the cold-blooded demon he used to be, Rui's entire personality reset.
"M-Mother? Father?" Rui whispered, his red eyes brimming with tears.
Tamayo gently stroked his forehead. "They're gone, Rui… but you're free now."
After one week of checking on Rui, he let out with an enchanted bracelet on him to monitor and check on Rui's body, mind, and soul.
Rui sniffled. "So I can eat normal food now and play with other kids ?"
Raja grinned. "Yup. You're officially Wolverine now. Bonus: Super regeneration."
Rui immediately burst into happy tears he doesn't know what wolverine is but he can do normal kid's stuff without getting sick.
"I CAN EAT CAKE?! I CAN EAT RAMEN?! I CAN PLAY IN THE SNOW?!"
Tamayo nodded. "Yes, dear."
Rui clapped his hands together, eyes sparkling."GOD, PLEASE BLESS THIS MAN. AND PLEASE REINCARNATE MY PARENTS IN A LOVING FAMILY. ALSO, MAKE SURE I NEVER LOSE MY HAIR, AMEN."
Raja deadpanned."This kid prays a lot for someone I kidnapped."
Tamayo smiled."He's happy. Let him be."
Next, Raja turned to Tamayo.
"Alright, your turn, doc."
Tamayo paused."I… I don't know if I want to be human again."
Raja narrowed his eyes."Fine. You have five seconds to decide before I stab you with the needle anyway."
Tamayo: "W-WHAT?!"
Five seconds later…
STAB new vaccine 2.0. Created in just one week and it directly burn the Muzan blood directly and contain the Mutational powers in the DNA, Raja created X-MEN.
Tamayo screamed, then glowed dramatically.
When the light faded, she blinked.
"I… I can still make illusions…?"
Raja smirked. "Superpowered human, baby. Congrats!"
Yushiro pouted."I WANT BE HUMAN TOO!"
Raja: "Sure, kid."STAB.
Yushiro: "WAIT, WHAT—AGH!"
Suddenly, Yushiro could mind-control people like Professor X.
Raja grinned. "Alright, mind-reader boy, don't use your powers on people or I'll delete them, got it?"
Yushiro paled."Y-YES SIR."
Meanwhile, the Demon Slayer Trio—Tanjiro, Zenitsu, and Inosuke—were forced into hardcore training under the Hashiras.
How?
Because Raja blackmailed the Hashiras with:
✔ Endless gourmet food.
✔ Bribing them with gold.
✔ Threatening to fight them for fun.
By the end of the month, Tanjiro trained under Flame Hashira, Inosuke under Wind Hashira, and Zenitsu under Sound Hashira.
And somehow they were now almost Hashira-level fighters without even unlocking the Slayer Mark.
"I FEEL SO POWERFUL!" Inosuke screamed, flexing dramatically.
Zenitsu: "I JUST WANT TO LIVE IN PEACE, WHY AM I SUFFERING?!"
Tanjiro: "We should thank Raja for this opportunity!"
Raja, watching from the shadows: "They have no idea I planned this just for my entertainment."
Finally, the Mugen Train mission was announced.
Raja sent the trio along with Flame Hashira Rengoku, now fully upgraded to 'Flame Hashira 2.0.'
But, of course, Raja wasn't just going to sit this one out.
"Stealth mode activated!" Raja vanished into the shadows, planning to watch the fight for fun.
If anything unexpected happened?
He'd step in.
If Akaza dared to kill Rengoku or another Demon enters the fight?
Well…
Then it'd be time to burn the whole train station down.
TO BE CONTINUED… 🔥