Demon Slayer: A New Enemy

What if Muzan wasn't defeated and instead pulled a trump card in order to save his own skin? A new king destined to bring terror once more. What if some of the uppermoons were cured thanks to Tamayo's cure efforts? A new ally arises to help the fellow slayers to defeat a new enemy.

Note: To those who don't know Demon Slayer, watch the anime and/or read the manga. Because it wouldn't make sense for the new readers.

I do not own the Demon Slayer characters nor the story. I used it as a reference to maintain the continuity of the story with a few changes in this AU fanfic. Also I own my original characters here, and there will be spoilers up ahead. Click at your own risk and enjoy it.