Asakusa, Tokyo.
Compared to the Demon Slayer Corps headquarters hidden in the mountains, this place was a shining beacon of progress—an urban sprawl of electric lights, rumbling carts, and Japanese signs.
The air thrummed with the chatter of vendors, clacking geta on stone streets, and the ever-present din of life.
A woman walked through the crowd.
Clutched in her hand was a paper-wrapped medicine bag.
She was graceful.
Quiet.
Beautiful enough to stand out even among the crowd of Asakusa's modern fashionistas.
Tamayo.
Yami Tsukishiro's next target.
A demon.
And more importantly... one who had cheated death.
Her beauty was delicate and refined. Eyes like soft violet fog, lips a vibrant red against the pallor of her skin. Her long, raven-black hair was parted down the middle and tied into a low bun, secured by an elegant floral hairpin.
She wore a deep plum kimono embroidered with soft lilac branches and tiny red blossoms, a pale beige obi wrapped neatly around her waist.
There was a certain stillness to her presence, like she wasn't fully part of the world anymore.
[Monster Data]
Name: Tamayo
Race: Demon (Undead Variant)
Threat Level: Rare-Class Demon
Rank: ★★ (Second Level)
Template: Evil Demon - Juyo
Memes Equipped:
E-Rank: Demon Bloodline (Lv.2)
E-Rank: Blood Demon Art (Lv.2)
As expected—she survived.
But the system data raised more questions than it answered.
Yami squinted at her status screen, puzzled.
Something felt... off.
First anomaly:
Her Blood Demon Art was listed as E-Rank.
But Muzan Kibutsuji, despite sharing the same template, was listed as D-Rank.
Same meme. Different tier.
That had never happened before.
Until now, meme tiers had always been fixed by template. But this? This was like giving two people the same Pokémon, but one of them had a shiny evolution and the other had a Magikarp with self-esteem issues.
Second anomaly:
Her emotional record.
Yami's eyes narrowed further.
According to the memory scan, Tamayo had the same romantic experience template as Miyamoto Rei.
Miyamoto Rei—the hot-blooded high school girl from Highschool of the Dead. That kind of "emotional template."
Huh?
That's... not right.
Wasn't she supposed to hate Muzan for turning her into a demon and killing her husband and children? That was the whole reason she defected and worked with Ubuyashiki. So how could her data read like she was a lovesick widow who got NTR'd by her own backstory?
The system's memory prompt even phrased it weirdly:
"Turned by a man she once trusted... slaughtered her own parents... now hates the world but still yearns for emotional connection."
What the hell was this contradiction?
Wasn't she supposed to be grieving her dead family?
Why the hell is the 'promised widow' suddenly written like a misunderstood anime waifu with trust issues and big sister energy?
Yami pinched the bridge of his nose.
"Is the world gaslighting me... or is someone rewriting flags while I'm not looking?"
He stared at the info panel again.
Tamayo, former physician.
Turned by Muzan. Hates demons. Searching for a cure.
All facts checked out.
But the flavor text?
That was a whole other fanfic.
Yami's fingers twitched.
Something about this screamed author patch update.
The system didn't lie. But it definitely trolled.
"The more I read, the more it feels like the world's trying to tell me something," he muttered under his breath.
Although something felt undeniably off…
This woman was Tamayo.
And yes—she was absolutely qualified to receive a Special Invitation.
As she walked along the bustling road of Asakusa, blending into the crowd with practiced grace, something made her footsteps halt.
Her eyes narrowed slightly.
There was... something.
Something beneath her feet.
Her gaze dropped.
A dark stain writhed beneath her shadow. No, not a stain—a living shadow.
It was already too late.
Squelch—
Without a single sound escaping her lips, she was yanked downward—dragged into the infinite, oppressive blackness of Shadowspace.
"!!!"
The silence was crushing.
No breeze.
No heartbeat.
No exit.
Tamayo's instincts kicked in immediately. Her eyes sharpened, and her fingernails extended with an audible crack.
In one smooth motion, she slashed her right wrist, blood pouring from the wound like a crimson ribbon.
Her voice was calm as ever.
"Blood Demon Art—Blood-Charming Visual Dream Fragrance."
The scent of her blood filled the void, rich and laced with enchantment.
A blood-based hallucinogen.
Designed to warp the senses and confuse the enemy's perception of reality.
But—
It didn't work.
Not here.
Not in this unnatural realm where even sound struggled to exist.
"Foolish," a voice echoed from the abyss, low and unhurried. "Don't use moves you don't understand."
A chilling presence swirled through the darkness.
Tamayo tensed.
The voice didn't speak from a direction—it existed everywhere. It was soaked into the very texture of the void.
Then, a whisper brushed past her like a lover's breath:
[If you want Muzan Kibutsuji to die—
If you want to resurrect your family—
Then come to the Dungeon.]
The words weren't just heard. They echoed inside her mind, like a command seared into her soul.
Before she could react again—
The voice faded.
The shadow receded.
The darkness collapsed inward.
And then she was gone.
Meanwhile, Yami stood calmly at the threshold of the dungeon, Ella and the others at his side.
The fourth invitation had been received.
Four out of six...
Only two remained.
"Now, it's just a matter of who wants it the most."
Back in the silence of the void, Tamayo floated alone.
Still suspended in shadow.
Still unsure what had just happened.
She narrowed her eyes, recalling the voice's words.
"Kill Muzan."
"Resurrect your family."
Two impossible desires.
Two truths she had long buried.
And yet... with that strange power...
If what he said was true...
She closed her eyes.
"…Yushiro," she whispered. "Live for yourself."
The words were soft. Barely audible. A farewell.
Tamayo reached out—her pale fingers brushing against the glowing sigil suspended in the void.
--
Light spilled once again onto the square of the underground city—The Dungeon.
One path lit up.
Then a second.
A third…
Until the sixth path finally materialized.
Yami Tsukishiro stood at the center of the square, arms crossed, gaze calm.
He wasn't disappointed.
In the end, Tamayo and Kanae both accepted the Special Invitation.
And now they stood before him, surrounded by shadowed marble, strange sky above, and a silence that pressed down like fog.
As soon as their feet touched the Dungeon's surface, the rules embedded into its very fabric engraved themselves into their souls—a binding oath stronger than blood.
In that moment, Awaka Rakana's eyes locked onto someone across the square.
Kocho Kanae.
And Kanae felt it too—that flicker of recognition from another lifetime.
"…Are you… Kanao?" Kanae asked softly, voice trembling. "It's me. Kanae. Do you remember?"
The young girl didn't answer.
Instead, Kanao dashed forward and threw her arms around Kanae, burying her face in her shoulder without a single word.
Kanae froze in place—just for a heartbeat.
Then a gentle, glowing smile appeared on her lips.
She slowly brought a hand up and began stroking Kanao's hair with warm tenderness.
"…You've grown up so much, Kanao."
"Kanae-sama!! Is that really you?!"
A shocked voice rang out.
Kanzaki Aoi stood frozen on the edge of the square, her eyes wide with disbelief and tears brimming.
Kanae turned to her and smiled gently once more. Her gaze dropped to the butterfly hairpin nestled in Aoi's dark hair.
"…Little Aoi?"
That was all it took.
Aoi broke down completely and ran forward, arms wide and eyes streaming.
"It's me! I-It's really me, Kanae-sama! Everyone missed you so much!"
The three embraced under the flickering sky of the Dungeon, their reunion like something out of a dream too beautiful to wake from.
Tamayo and Makomo watched quietly from the side, saying nothing. Not wanting to intrude.
After some time passed and the emotions had settled, Tamayo finally broke the silence.
"…May I ask who you all are?"
Her voice was soft and composed, yet unmistakably curious.
A round of introductions followed.
Kanao. Aoi. Kanae.
Tamayo and Makomo.
And then…
Realization dawned.
Two active Demon Slayer Corps members.
One Demon.
One… ordinary human?
The group exchanged quiet, unsure glances.
Kanao's eyes narrowed the moment she heard Tamayo described as an Evil Demon.
Her hand instinctively moved to the hilt of her sword.
But Kanae stepped in.
She gently pressed Kanao's hand down.
"Wait. Miss Tamayo… I can tell. You're different from the other demons I've faced."
Her eyes met Tamayo's directly, without fear. There was… hope.
Tamayo nodded slowly, not hiding anything.
"Yes. I was once deceived by Muzan Kibutsuji. I became a demon… and in the haze of my transformation, I killed my own parents."
Her voice did not waver. She didn't flinch.
"But eventually, I woke up. I escaped his control. Since then, I've lived in hiding… researching ways to kill him. I have also been in direct contact with the leader of the Demon Slayer Corps."
Kanae's brows lifted in surprise.
"The Master… he knows who you are?"
Tamayo gave a soft smile.
"Yes. He has known from the beginning."
Kanae paused for a long moment.
Then, slowly, she turned back to the others.
"If the Master trusts her… then I trust her too."
A gentle hush fell over the group.
For the first time—Kanae realized that not all demons were monsters.
That perhaps… there was a path beyond hate.
"…Well," Nezuko finally mumbled, her voice barely above a whisper. "Can anyone else… see the words floating in front of me? It says I'm an Evil Demon."
Her tone was confused. Almost guilty.
The others blinked in surprise.
"Wait—what?" Kanae asked.
"You're a demon too?"
They exchanged puzzled glances.
Wasn't she the one labeled "ordinary human" earlier?
Nezuko lowered her head, her shoulders trembling a little.
"…I'm sorry. I don't really know what's going on…"
Her voice quivered as she spoke.
"When I woke up, my whole family was already… gone. My mother, my brothers, my sisters… they were lying in a pool of blood. Not breathing."
Her fingers curled tightly at her side.
"Then a man's voice spoke to me. He said… if I caught the ball of light, I could save them. So I came here."
A pause.
"I heard the same thing," said Makomo, quietly stepping forward. "He told me… I could kill the Hand Demon."
"I was told I'd see Shinobu-nee again…" Kanzaki Aoi added, raising her hand slowly. "So I came too…"
"Same for me," Kanae nodded. "He said I'd be reunited with those I lost."
Tamayo's eyes narrowed.
"…Am I the only one who didn't see anyone?" she asked. "I only heard a voice in the dark."
Kanae gave a thoughtful nod.
"It seems… we were all drawn here by similar promises."
Then she turned toward Nezuko, looking gently at her.
"If that's true… then Nezuko's home must have been attacked by demons. And she herself… turned into one."
—
[Your guess is accurate.]
[To be precise, in this Dungeon… you each have the opportunity to realize your wishes.]
The voice wasn't just a whisper now—it echoed through the vast square, smooth and controlled.
Everyone's head turned at once.
A glowing sigil hovered midair. Lines of golden text scrolled across the dark space.
Yami Tsukishiro had spoken.
—
[I am the Master of the Dungeon. The one who governs the Multiverse Dungeons.]
[I summoned you here from your respective worlds… to become Adventurers.]
[Each of you carries a wish. A wound. A reason.]
[Here in this Dungeon, you will be tested. If you succeed—your desires will be fulfilled.]
And then, the final line stunned them:
[Let me give you some additional good news.]
[The world you came from—"Demon Slayer: Kimetsu no Yaiba"—is safe.**
[The threat of Muzan Kibutsuji and the evil demons has already been eliminated.]
[They have been wiped out.]
Silence.
Total, staggering silence.
"…Gone?" Makomo breathed.
"Muzan is… dead?"
Kanae's eyes widened.
Kanzaki Aoi's mouth opened, but no words came out.
Even Tamayo—who had lived her life chasing that single goal—stood frozen in place.
Only the Demon Slayer Corps could truly understand the weight of that sentence.
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