Screen 1 – Papyrus Joins Inosuke vs Spider Father
Deep in the heart of Mount Natagumo, the forest shakes like a living beast.
Trees crack.
Branches fall.
The ground trembles under heavy footsteps.
Inosuke charges through the woods, screaming with excitement.
"WHERE ARE YOU!? COME OUT AND FIGHT ME!"
A massive shadow drops from above.
Spider Father crashes onto the ground—the huge, hulking monster with a human torso glued onto a giant spider body.
It roars, shaking the entire mountain.
Inosuke's eyes shine under his boar mask.
"FINALLY! A REAL BATTLE!"
He sprints at the demon, blades ready.
Spider Father swings a giant arm—
Inosuke blocks but gets blown backward, rolling through bushes.
"HAHAHA! PERFECT!"
He charges again.
---
Papyrus Arrives
Papyrus bursts through the trees like he's making a heroic entrance.
"FEAR NOT, INOSUKE! THE GREAT PAPYRUS HAS ARRIVED!"
Inosuke stops mid-charge, confused.
"WHAT ARE YOU DOING HERE, SKELETON!? THIS IS MY FIGHT!"
Papyrus salutes proudly.
"I SAW A GIANT MONSTER! I COULD NOT IGNORE IT!"
Spider Father roars again and rushes them, dragging his massive spider legs across the dirt.
Papyrus gasps.
"OH NO! HE IS LARGER THAN EXPECTED!"
Inosuke laughs wildly.
"GOOD! I LIKE BIG ENEMIES!"
---
The First Clash
Spider Father swings again.
Papyrus summons a bone shield.
"BONE WALL!"
The shield cracks immediately, sending Papyrus sliding backward.
"HE IS VERY STRONG!"
Inosuke doesn't wait.
He leaps off a tree trunk and slashes down on Spider Father's back.
"BEAST BREATHING… SECOND FANG!"
The blades dig in—
but barely.
Spider Father flings Inosuke off like a toy.
Papyrus rushes forward.
"NO THROWING INOSUKE!"
He summons a giant bone hammer and slams it into Spider Father's leg.
CRACK
The demon stumbles for the first time.
Inosuke jumps back to his feet.
"HEY! DON'T STEAL MY KILL!"
Papyrus points proudly.
"WE SHALL SHARE THE GLORY!"
"NO!"
"YES!"
Spider Father roars and charges again, furious.
---
The Turning Point
Inosuke dodges under a massive swing, using the momentum to climb up the demon's arm.
"This monster is MINE!"
Papyrus sends bone projectiles from the side, distracting Spider Father.
"STAY STILL, LARGE SCARY MAN!"
Inosuke yells,
"I SAID THIS IS MY FIGHT!"
Papyrus yells back,
"AND I SAID I AM HELPING LIKE A HERO!"
Together, they push the demon back—
Inosuke slashing from up close,
Papyrus blasting from range.
Spider Father collapses to a knee, injured and furious.
Inosuke flips off his arm and prepares the final strike.
"BEAST BREATHING… SEVENTH FORM—"
Papyrus cheers loudly,
"FINISH HIM, INOSUKE!"
Inosuke brings both blades down—
SHING
Spider Father's head falls.
The giant demon crashes to the forest floor, defeated.
---
Aftermath
Inosuke stands over the corpse, chest swelling with pride.
"THAT WAS AMAZING! I WANT TEN MORE OF HIM!"
Papyrus flexes dramatically.
"YES! BECAUSE WE FOUGHT AS TRUE ALLIES!"
Inosuke glares.
"I DID THIS SOLO!"
Papyrus points at himself.
"I EXISTED SUPPORTIVELY!"
Inosuke grumbles… but doesn't argue further.
The forest grows quiet again.
And somewhere deeper inside, a chilling presence begins to move.
Rui is waiting.
Screen 2– The Lower Moon Appears
The forest goes silent.
Not peaceful—dead silent.
Even the wind seems afraid to move.
Tanjiro steps into a clearing filled with shredded webs and collapsed Demon Slayers.
Each one is cut, bruised, but breathing.
"They're still alive," Tanjiro says softly.
"But barely… Rui pushed them past their limits."
Sans kneels down, placing one hand near a tangled corpse of web.
His blue eye flickers.
"These threads… they're different. Stronger. Sharper. And whoever made them? He's close."
Papyrus marches forward, trying to look brave but whispering to Tanjiro,
"HEAR ME OUT… I THINK THIS DEMON IS GOING TO BE VERY UNFRIENDLY."
Inosuke bursts through the trees, dragging three unconscious Slayers by their arms.
"HEY! I SAVED THESE PATHETIC GUYS! PRAISE ME!"
Papyrus gasps.
"VERY HEROIC OF YOU!"
Inosuke puffs up with pride.
Then a voice cuts through the forest like ice.
"So much noise."
A small figure steps out of the shadows.
Barefoot.
Pale.
Eyes deep crimson.
Rui.
Lower Moon Five.
His threads drift gently from his fingers like spider silk.
Tanjiro's heartbeat tightens.
"This aura… it's nothing like the others."
Rui looks at them all, bored.
"You shouldn't have come here. You're disturbing my family."
Sans stands beside Tanjiro, hands in pockets, expression suddenly serious.
"Funny. Looks to me like you're the one disturbing people."
Rui tilts his head.
"A talking skeleton… interesting. Muzan was right. This mountain attracts strange creatures."
Papyrus gasps loudly.
"RUDE! WE ARE HEROIC CREATURES!"
Rui doesn't react.
His threads tighten around his fingers, humming with deadly tension.
"I think I'll take your lives as punishment."
---
The First Strike
Rui flicks his finger.
THWIP
Razor-sharp threads cut through the air, aiming straight for the three Slayers Inosuke rescued.
Inosuke screams,
"NO YOU DON'T!"
He dives, blocking the threads with both swords—
but even his blades barely stop the slice.
Papyrus jumps in with a massive bone shield shaped like a rib cage.
"BONE GUARD!"
The threads carve cracks into the shield but don't break through.
Papyrus grits his teeth.
"THIS DEMON IS TOO STRONG! BUT I, THE GREAT PAPYRUS, WILL NEVER GIVE UP!"
Sans teleports behind the injured Slayers, placing them out of Rui's range.
"Get behind me. Kid, Papyrus—keep him busy."
Tanjiro nods, sliding into Water Breathing stance.
Rui turns slightly, surprised.
"You avoided my threads. Not bad."
Sans shrugs.
"Buddy, I've dodged worse."
---
Tanjiro vs Rui Begins
Tanjiro charges forward, blade glowing under moonlight.
"Water Breathing… Second Form!"
He slashes the threads—
but Rui reinforces them with Blood Demon Art.
The blade barely cuts.
Tanjiro's eyes widen.
"His threads… they're too hard!"
Rui smiles coldly.
"You can't cut them. None of you can."
Papyrus throws bone projectiles to break his focus, but Rui slashes each one midair without even looking.
Sans whistles.
"He's got crazy reaction speed."
Rui turns toward Sans.
"You. Skeleton. You're dangerous."
Sans sighs.
"Yeah, I get that a lot."
---
Deadly Web Cage
Rui lifts both arms.
A dome of threads spreads across the clearing, sealing everyone inside.
Tanjiro gasps.
"A trap!"
Papyrus swings his spear, trying to break the walls.
"WHY DOES EVERY DEMON HAVE TERRIFYING INTERIOR DECORATIONS!?"
Inosuke smashes the threads with dual blades.
They don't even crack.
Rui steps forward.
"None of you can escape. Now… let's see how you break."
Sans' eye glows bright blue.
"Kid," he whispers to Tanjiro.
"Hope you're ready. Because this is going to get messy real fast."
Rui's threads tighten, preparing to shred them all at once.
Tanjiro steadies his breathing.
Papyrus raises his shield.
Inosuke roars and charges.
Sans lifts his hand, the air bending around his fingers.
The fight with Lower Moon Five begins.
To be continued.