Chapter Text
The Infinity Castle shuddered.
Screams echoed through the twisting halls, blood painted the floors, and the heat of breathing, furious humans filled the cold, endless space.
It was the final war.
The era of demons was ending.
Douma, Upper Moon Two, was laughing.
Or trying to.
His smile, ever-present and cruel, faltered.
His body trembled, frost melting off his skin as blood poured from his mouth.
Not the usual crimson he’d laugh off, but a thick, dark, burning poison.
It ate away at him from the inside.
Shinobu Kocho, her body already crumbling in his arms, had smiled too.
"You devoured me, monster… but I devoured you too."
And she had won.
He fell to his knees, breath catching, colors blurring.
His body was breaking, his skin dissolving.
For the first time in centuries, he felt pain.
Real pain.
Terror.
And something else, something worse…
Loss.
“...Snowdrop…”
She heard it.
From the shadows where he had hidden her, her heart which once never knew real fear, cacked wide open.
She ran, not caring about the demon slayers who stood in shock as the elegant, now-human girl sprinted barefoot through chaos.
She reached him just as he collapsed, blood dripping from his lips, his eyes glazed with that ever-present sparkle of amusement, now laced with something… tender.
“D-Douma!” she cried, falling to her knees beside him, cradling his head.
He looked up at her, dark lashes blinking slowly, and then he smiled.
A real smile.
Not manic.
Not cold.
But genuine.
“You’re so beautiful,” he whispered, “Even now… still mine.”
She shook her head, tears slipping down her cheeks, “You’re dying, please, don’t leave me! Please, please—!”
“I… never understood anything,” he breathed, voice weakening, “But you. You made me want to understand…”
He raised one trembling hand, brushing her cheek with his claw for the last time.
“I’m glad… it was you.”
Snowdrop’s hands trembled.
Her whole body began to glow faintly.
The last traces of her former self, fairy magic, delicate and immortal—cracked and shimmered.
“No,” she whispered, realization dawning.
“I was born… from you.”
Douma smiled wider, even as blood slipped past his lips.
“Then… we die together.”
He melted into her arms, his body turning to dust and ash.
And she, his snowdrop, glowed one last time.
Her form dissolved like a petal in the wind, warmth in the cold.
No scream.
No anger.
Just a soft sigh as if she welcomed the end.
The last thing she did was press her lips gently to his brow.
A goodbye kiss.
They vanished together, the spot where they had fallen now littered with pale white petals of frozen ice like a snowdrop blooming one final time.
Tanjiro arrived later.
He stood among the chaos, sword trembling in his hand, tears falling freely.
“She loved him…” he whispered, voice cracking. “Even though he was… Douma.”
No one spoke.
No one could.
Because in the heart of that twisted castle, amid death and vengeance… love bloomed too.
A sad, broken love.
But love, nonetheless.