Screen 1 – Mount Natagumo
Night settles over the forest as Tanjiro, Sans, Papyrus, Zenitsu, and Inosuke reach the foot of a tall, mist-covered mountain.
The crow lands on Tanjiro's shoulder.
"Mission! Mount Natagumo! Many Demon Slayers have disappeared!"
Tanjiro nods, seriousness returning to his voice.
"We need to hurry. People are dying up there."
Zenitsu clutches his head.
"Dying!? WHY DO WE ALWAYS GO TO THE MOST DANGEROUS PLACES!?"
Inosuke roars proudly.
"DANGEROUS? GOOD! I WANT STRONG DEMONS!"
Papyrus points dramatically at the mountain.
"THIS FOREST LOOKS OMINOUS! WHICH MEANS A HERO LIKE ME IS NEEDED!"
Sans squints up at the fog.
"Something's off. Real off. Magic feels… sticky."
Tanjiro looks at him.
"Sticky?"
"Yeah," Sans mutters. "Like something is pulling on the air itself. Threads."
The group steps into the trees.
---
The Webs Begin
The forest floor feels unnaturally soft.
The deeper they move, the darker everything becomes.
Moonlight gets swallowed by thick clouds.
Tanjiro stops suddenly.
"I smell something unnatural… something like poison and decay."
A Demon Slayer suddenly stumbles out of the bushes.
His eyes are glassy, body jerking like a puppet.
Zenitsu screams.
"WHAT IS WRONG WITH HIM!? WHY IS HE MOVING LIKE THAT!?"
Tanjiro grabs the man, trying to steady him.
"Sir! What happened!? Can you hear me!?"
The Slayer's head snaps toward Tanjiro…
but he's not looking at him.
He's looking past him.
Pulled by invisible threads.
Sans raises a hand.
"I felt that. Someone's controlling him like a doll."
Papyrus gasps.
"LIKE MARIONETTES!? THAT IS TERRIFYING!"
The Demon Slayer falls limp, then his body rises again like a puppet on strings.
Inosuke points his blades forward.
"FINALLY! A WORTHY CHALLENGE!"
Tanjiro shouts, "No! He's being controlled—we can't kill him!"
Sans steps close, eye glowing blue.
"Relax. I got this."
A thin blue pulse spreads through the air, revealing dozens of web-like threads controlling the Slayer's limbs.
Tanjiro's eyes widen.
"So that's… what it is."
Sans snaps the threads with a gravity pulse.
The Slayer collapses, unconscious but alive.
Zenitsu looks horrified.
"This mountain is cursed… I want to go home…"
Papyrus pats him on the back.
"FEAR NOT! GOING HOME IS NOT AN OPTION! WE MUST BE HEROIC!"
Tanjiro looks deeper into the forest.
"There's a family of demons here… and they're strong. Stronger than the last ones we fought."
Sans adjusts his hoodie.
"I can feel them too. Something big is waiting."
Inosuke grins savagely.
"GOOD. LET ME AT 'EM!"
The group steps forward together as the webs thicken around them.
Spider demons are waiting.
Screen 2 – Split Paths on Mount Natagumo
The deeper the group pushes into Mount Natagumo, the thicker the webs become.
Every tree is wrapped in silk.
Every shadow feels alive.
Tanjiro stops suddenly.
"There are multiple demons… and they're spread out."
Sans nods.
"Yeah. One's close. Another is way deeper in. And something huge is moving to our right."
Papyrus raises his hand proudly.
"THEN LET US FORM HEROIC TEAMS!"
Zenitsu screams, "WHY ARE WE FORMING TEAMS ON A MURDER MOUNTAIN!?"
But the mountain decides for them.
A web yanks Zenitsu and Papyrus in one direction.
Another thread pulls Tanjiro and Sans down a separate path.
And the ground collapses beneath Inosuke, dropping him into a deep forest pit.
The group is split instantly.
---
Zenitsu & Papyrus vs Spider Brother
Zenitsu crashes into a clearing and curls into a ball.
"WHY AM I ALWAYS WITH THE SKELETON!? WHY!?"
Papyrus lands beside him in a heroic pose.
"BECAUSE FATE KNOWS YOU NEED MY SUPPORT!"
A boy with a sickly face and white hair steps out of the shadows, carrying a box of spiders.
Spider Brother smirks.
"I'll enjoy tearing you apart slowly."
Zenitsu shakes violently.
Papyrus stands tall.
"WE SHALL FACE YOU TOGETHER!"
The Spider Brother sends dozens of spiders crawling across the ground.
Zenitsu shrieks.
Papyrus summons a giant bone shield.
"ZENITSU! FACE YOUR FEARS! AND ALSO FACE THAT BOY'S VERY BAD HAIRCUT!"
Zenitsu sobs louder.
---
Sans & Tanjiro vs Spider Mother
Meanwhile, Tanjiro and Sans reach a quiet clearing with a small river running through it.
A beautiful but broken demon woman sits in the center, holding puppet strings between her fingers.
Spider Mother.
Sans narrows his eye.
"She's controlling the Slayers. I can feel her magic."
Tanjiro nods.
"She's dangerous… but she looks like she's suffering."
Instead of attacking, Spider Mother raises her hand weakly.
"…leave… or I'll be forced to kill you."
Tanjiro lowers his sword slightly.
"She doesn't want to fight."
Sans stays beside him, calm but ready.
"Kid. Read her carefully. She's scared of something… or someone."
A massive presence stirs deeper in the forest.
The fear in her eyes grows.
"She's being controlled too," Tanjiro whispers.
Spider Mother lifts her threads.
"I… don't have a choice."
Dozens of puppeted Demon Slayers charge toward them.
Sans steps forward.
"I'll drop the strings. You handle the rest."
His left eye glows blue.
"Gravity Pulse."
The threads snap one by one.
Tanjiro moves in.
"This demon… she deserves mercy."
---
Inosuke vs Spider Father
Deep in the forest, Inosuke stands up from the pit, laughing.
"This place is PERFECT! SHOW ME A STRONG DEMON!"
A gigantic, hulking spider mutant crashes through the trees—
Spider Father.
Inosuke's eyes sparkle under the boar mask.
"YES! YOU'RE MINE!"
He charges, screaming wildly as the giant spider demon roars back.
---
The Arc Splits Into Three Battles
Zenitsu & Papyrus face the crawling terror of Spider Brother.
Sans & Tanjiro confront the tragic, controlled Spider Mother.
Inosuke challenges Spider Father head-on.
The mountain shakes as all three battles begin.
Be continued