Trapped within the terrifying form of Muzan Kibutsuji, the Demon King, a young woman named [Y/n] wakes up in her favorite manga! With all of Muzan's powers and his monstrous reputation, she faces an impossible choice: fulfill his dark legacy or rewrite her own terrifying destiny? Can she survive the hunt, navigate treacherous demon politics, and find a way back to her world before she loses herself to the villain within?

In a world reborn, Giyuu Tomioka, once a formidable Water Hashira, finds herself navigating a modern city, carrying the echoes of a past life she's desperately trying to leave behind. A chance encounter in a music store could ignite a new melody, but the shadows of forgotten comrades and unresolved emotions linger. Can she truly embrace this new, more feminine self, or will the past catch up, entwining her fate with the very people she sought to avoid: Sanemi and Obanai?