The courtyard of the Demon Slayer Corps estate was silent—too silent.

It wasn’t the peaceful kind.

It was the kind that waited for something to break.

Tanjiro was forced to the ground, his hands bound, his breathing uneven but determined. The wooden box lay just a few feet away from him… the one he had protected with his life.

Zenitsu trembled beside me, clutching his sleeves.
Inosuke strained against the Kakushi holding him back, snarling in frustration.

And I—

I stood behind them.

Half-hidden.

Like always.

My fingers were gently clasped together, my expression calm, my smile soft… but my eyes never left the box.

Because I knew what was inside.

And more importantly—

I knew who was inside.

—

A Hashira stepped forward.

Sanemi Shinazugawa.

The air shifted the moment he moved. Violent. Unpredictable. Dangerous.

Without hesitation, he grabbed the box.

Tanjiro’s voice cracked instantly.
“Stop! Don’t touch her—!”

Sanemi didn’t listen.

Of course he didn’t.

To him, there was only one truth.

Demons must die.

—

I took a small step forward—

Then stopped.

No.

Not yet.

—

Sanemi drew his blade and stabbed the box.

The sound echoed.

A sharp, splintering crack.

Zenitsu gasped.
Tanjiro screamed.

My chest tightened—but my face didn’t change.

I stayed still.

Watching.

Waiting.

—

Then Sanemi did something worse.

He cut his own arm.

Blood spilled freely, the scent immediately filling the courtyard.

Thick. Sweet. Irresistible.

Even from where I stood, I could feel it.

A test.

A cruel one.

He held his bleeding arm near the opening of the box, his voice filled with challenge.

“Come on, demon… show your true nature.”

—

Everything went quiet.

Even the wind seemed to stop.

Inside the box… something shifted.

Slowly.

Carefully.

Nezuko Kamado emerged.

Her eyes were sharp. Her fangs visible.

A demon.

No one breathed.

Tanjiro’s voice was barely a whisper now.
“Nezuko… don’t…”

—

She looked at the blood.

Then at Sanemi.

Then—

She turned away.

—

The moment shattered.

Shock rippled through the courtyard.

Sanemi’s expression twisted—not in relief, but in disbelief… then anger.

“What kind of trick is this?!”

He stepped closer again, more aggressive now, pushing his bleeding arm toward her.

“Drink it!”

—

My fingers tightened slightly.

Just slightly.

That was all.

—

Nezuko trembled.

Her body reacted instinctively—her nature pulling her forward.

But she resisted.

She turned her head again, refusing.

Her hands clenched.

Her entire body shook…

But she didn’t give in.

—

Tanjiro’s eyes filled with tears.

“She’s… she’s different! I told you!”

Zenitsu sniffled loudly beside me, already crying.
Inosuke went quiet for once, watching closely.

—

And me?

I finally exhaled.

Softly.

Quietly.

A melody slipped from my lips before I could stop it.

Barely louder than the wind.

A gentle, soothing hum.

—

It wasn’t meant for anyone.

But somehow…

It reached them.

Tanjiro’s breathing steadied.
Nezuko’s trembling eased—just a little.
Even the suffocating tension in the air softened at the edges.

—

Sanemi froze for a second.

Just a second.

His eyes flicked around the courtyard.

“...What was that?”

No one answered.

Because no one knew.

—

I had already stepped back again.

Back into the shadows.

Where I belonged.

My smile returned, soft and innocent, as if I had done nothing at all.

—

From above, a calm voice spoke.

The leader.

Kagaya Ubuyashiki.

He acknowledged what had just happened. The proof. The impossibility.

A demon… who refused human blood.

I lowered my eyes politely.

As if I hadn’t noticed.

As if I were just… another background presence.