Screen 1– 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.Screen 2 – Spider Mother vs Sans and Tanjiro
The forest grows strangely quiet as Tanjiro and Sans step into an open clearing.
Moonlight filters through the branches, lighting a woman sitting alone among tangled webs.
Her posture is fragile.
Her eyes empty.
Her hands tremble as she threads invisible lines through the air.
Spider Mother.
Sans stops beside Tanjiro, voice low.
"She's scared. Not of us… but of something deeper in the forest."
Tanjiro's nose twitches.
"…fear. Sadness. Pain."
He grips his sword tighter.
"She's being forced to fight."
Spider Mother lifts her chin weakly.
"If I don't… he'll tear me apart."
Her voice cracks with exhaustion.
Tanjiro nods gently.
"You don't have to do this."
But chains of white silk tighten around her wrist.
She winces in pain, as if the forest itself is punishing her.
Then her tone changes—sharper, panicked.
"No choice… no choice… I have no choice!"
She raises her hands.
Dozens of zombie-like Demon Slayers fall from the trees, their bodies controlled like puppets.
They charge forward, limbs bending unnaturally.
Sans steps in front of Tanjiro.
"No killing. I'll break the strings. You handle the rest."
His eye flashes blue.
Gravity Pulse.
A shockwave snaps every thread in the clearing.
The puppeted Slayers collapse, no longer forced to move.
Spider Mother stares, shocked.
"You… broke my threads? With… what?"
Sans shrugs.
"Just a little trick."
Tanjiro moves ahead.
"Please stop. You don't want to do this."
Her lips tremble.
Tears well in her eyes.
But the threads on her arms tighten again—
forcing her to stand.
"No… I said STOP!"
She raises her hands and summons a massive web dome overhead.
The threads fall like rain.
Tanjiro dodges and cuts through them.
Sans warps through with tiny blue flashes.
Spider Mother screams in anguish.
"JUST LET ME DIE!"
Tanjiro freezes.
"…you're asking for mercy."
The dome collapses.
She lowers her hands, accepting her fate.
Tanjiro steps forward with sadness in his eyes.
"I understand."
Sans nods slowly.
"She's ready. Give her peace."
Spider Mother closes her eyes, waiting.
Tanjiro's breathing steadies.
"Water Breathing… Fifth Form… Blessed Rain After the Drought."
His sword glides like falling rain.
A gentle cut.
Painless.
Peaceful.
Her head falls, but her face is calm… relieved.
Before her body fades, she whispers:
"Thank you."
She dissolves into dust under the moonlight.
The forest falls silent.
Sans looks at Tanjiro.
"You did the right thing."
Tanjiro wipes his eyes.
"She suffered for so long."
Sans pats his shoulder.
"Let's end this whole family. For her sake."
They walk deeper into the forest as a powerful aura trembles ahead.
Spider Father is waiting.