Dark Demon Slayer: After Saving Muzan, She Ran Off Pregnant

(Hakuji + Muzan + Koyuki, dark ethical fiction, don't read if you mind OOC)

“Muzan, why are you wearing Koyuki's clothes?”

After a hundred years in hell, Hakuji smashes through the flames, searching for a soul that vanished long ago.

Until the night of the blood moon.

“She” wears that bloodstained cherry-blossom kimono, gently brushing the burn scars on his back with her fingertips and smiling as tenderly as ever.

He knows it's a trap, yet willingly gives himself over to it.

But when the real Koyuki falls from heaven, she sees him locked in a passionate embrace with his “substitute.”

“Sorry I used you.”

Dressed as a woman, Muzan tears off her mask. Before disappearing, she leaves him with one last icy taunt.

She continues laying out a scheme to overturn the Three Realms, but one late night, she grips the window frame and retches violently.

She is carrying the child of that deranged Upper Rank.

Doma chuckles behind his fan. “She's carrying your child, and she's changed her name to ‘Muzan.’ She's in heaven, admiring the flowers.”

Akaza completely loses his mind.

He tears through the karmic underworld and storms the Celestial Court, only to see...

In a sea of red spider lilies, his beloved Koyuki reaches out to him through her tears;

Beneath a cherry tree, Muzan, her pregnancy just beginning to show, casts him a cold glance as blue spider lilies bloom brilliantly at her fingertips.

“Will you choose her, or me?”

Two voices overlap, their question piercing his soul.