luicine61

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Worlds

The Demon King's Immortal Regret

Muzan Kibutsuji, the first demon and humanity's greatest nightmare, finds himself inexplicably thrown back a thousand years to his human death—given one chance to rewrite the fate that turned him into the monster who would haunt the Demon Slayer Corps for centuries.

Characters

Public 🌍

Yoriichi Tsugikuni

by luicine61

The legendary swordsman who created Sun Breathing and nearly killed Muzan, the only warrior the Demon King ever truly feared.

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The Physician

by luicine61

The mysterious Heian period doctor whose experimental treatment inadvertently created the first demon, changing the course of history forever.