Screen 1 – Heading Toward Their Next Mission (Dark Version)
Dawn bleeds across the horizon in bruised shades of red and gray.
The wind cuts cold along the empty dirt road as Tanjiro, Sans, Papyrus, Zenitsu, and Inosuke walk toward their next mission—each step heavier than the last.
The crow circles above like a carrion bird waiting for corpses.
"Mugen Train! Report immediately!" it screeches, voice sharp enough to twist nerves.
Zenitsu almost drops Nezuko's box.
"A TRAIN!? NO—NO—NO—DEMONS AREN'T SUPPOSED TO USE TRAINS! THAT'S CHEATING!"
Inosuke snarls at the metal monster in the distance.
"I WILL BREAK ITS IRON FANGS AND BATHE IN ITS SPARKS!"
Tanjiro rubs his forehead.
"Inosuke… trains don't have fangs."
"THEN WHAT IS THAT?!" Inosuke screams, pointing at the smoking engine.
Papyrus puts a comforting hand on him.
"FEAR NOT, INOSUKE! IF THE TRAIN SEEKS BATTLE, WE SHALL CRUSH ITS EVIL!"
Inosuke nods proudly.
"That's more like it."
Sans trails behind, hands in pockets, a shadow against the morning fog.
"…this job is gonna get bloody," he mutters.
Tanjiro smiles faintly.
"At least we're together. Whatever happens, we face it side by side."
Zenitsu trembles violently.
"What if—what if the train swallows people? What if the wheels chew them up!? What if—"
Papyrus interrupts loudly:
"ZENITSU, YOU ARE INVENTING NIGHTMARES AT AN UNUSUAL SPEED!"
Zenitsu collapses.
Sans stares ahead at the distant station.
Eyes hollow.
Expression unreadable.
"…you guys ready?"
Tanjiro nods.
"Yes. No matter how dark this mission becomes… we won't break."
Inosuke roars:
"I WILL SPLIT THE TRAIN IN HALF!"
Zenitsu wails:
"I DON'T WANT TO BE ON THE MENU!"
Papyrus shouts triumphantly:
"ONWARD, TO THE TRAIN OF DOOM!"
They descend the hill toward the looming metal beast—
completely unaware that something inside is already hungering for them.
---
Screen 2 – Meeting the Flame Hashira (Dark Version)
The Mugen Train hisses like a caged dragon.
Steam pours out like breath from a wounded beast.
Inosuke tries to attack it until Tanjiro and Zenitsu physically restrain him.
Sans eyes the train.
"Big. Loud. Smells like burning souls. Reminds me of someone."
Papyrus gasps.
"WHO?!"
"You'll see."
Inside the carriage, the lights flicker dimly.
There's an unnatural stillness in the air—like the walls themselves are listening.
And then—
"UMAI! UMAI! UMAI!"
Rengoku devours bento boxes like a warrior readying for battle with pure flame.
Papyrus freezes.
"WHAT TREMENDOUS ENERGY! HE COULD POWER AN ENTIRE UNDERGROUND CITY!"
Sans smirks.
"Yep."
Rengoku looks up mid-chew.
"AH! TANJIRO! ZENITSU! INOSUKE! GOOD TO SEE YOU IN GOOD HEALTH!"
His eyes widen when he sees the skeleton brothers.
"AND WHO ARE THESE…
SPLENDIDLY BIZARRE WARRIORS?"
Papyrus steps forward proudly.
"I AM THE GREAT PAPYRUS! JUSTICE INCARNATE! HERO TO ALL!"
Rengoku slams a fist to his knee.
"MARVELOUS! PASSION IGNITES THE SOUL!"
Papyrus beams.
Rengoku turns to Sans.
"And you?"
Sans gives a small wave.
"just sans."
Rengoku smiles brightly.
"JUST SANS! WELCOME ABOARD!"
Zenitsu whispers:
"There is… way too much loud charisma in here. I'm gonna die."
Inosuke jumps up.
"FLAME MAN! TEACH ME TO SHOUT LIKE THAT!"
"OF COURSE!"
Zenitsu faints.
---
Mission Briefing – Darker Tone
Rengoku stands, flames burning in his eyes.
"There are monsters on this train.
They hide among the innocent.
They will slaughter without mercy."
Tanjiro's knuckles whiten around his sword.
"We'll stop them."
Sans leans back lazily.
"Well. Someone's gotta clean up."
Papyrus salutes.
"WE SHALL BURN AWAY ALL EVIL!"
The lights flicker.
The train shudders.
A cold wind snakes through the cabin.
Rengoku's expression hardens.
"…a demon has already begun its work."
Sans stands up, blue light faint behind his eye socket.
"welp. showtime."
Tanjiro grips his blade.
"Stay sharp. Something is already hunting the passengers."
Papyrus raises a bone spear glowing white.
"FOR JUSTICE AND PASTA!"
The train speeds into the nightmare waiting beyond the darkness.
---
Screen 3 – Enmu's Dream Trap (Dark Version)
The train rattles through the void of night.
It feels like the world outside has vanished—just endless black swallowing the windows.
Passengers grow silent.
One by one, they slump in their seats.
A soft, sweet, poisonous heaviness fills the air.
Tanjiro staggers.
"What… is this…?"
Papyrus sways.
"MY… HEROIC… RESISTANCE… IS SLIPPING…"
Zenitsu collapses instantly.
Inosuke snarls, clawing at the floor—
and goes limp.
Rengoku falls asleep mid-bite, chopsticks still raised.
Papyrus leans against Sans.
"BROTHER… I… MUST… REST…"
Sans catches him gently.
"…damn it."
Papyrus goes still.
The whole train sleeps.
A pink mist curls around their bodies.
Strands of Blood Demon Art attach like parasitic threads.
And from the dark hallway—
Enmu emerges, smiling like a predator wearing human skin.
"Perfect…
All drifting into dreams."
His voice is soft, but hungry.
He walks past each sleeping warrior…
until he reaches Sans.
The skeleton is still standing.
Eyes half-open.
Breathing non-existent.
Completely conscious.
Enmu's smile falters.
"Oh?
Still awake?"
Sans shrugs.
"yeah. nap time's not really my thing."
Enmu's eyelid twitches.
He sends a ripping wave of dream-energy at Sans.
It splashes against him like water hitting stone.
Nothing.
Sans sighs.
"buddy… you're tryin' to drag a soul that doesn't sleep."
Enmu takes a step back.
"A creature… immune to dreams?"
Sans steps forward once.
The train floor groans under his weight.
"wake everyone up," Sans says quietly.
"last chance."
Enmu laughs nervously.
"You're surrounded by sleeping prey, skeleton.
You can't protect all of them."
Sans' eye ignites.
A burning, unnatural blue.
The cabin temperature plummets.
"Enmu… you have no idea what I can do."
Enmu recoils—
a demon finally feeling fear.
Sans stretches his fingers, cracks his neck.
"time to end your nightmare."
TO BE CONTINUED