Our Bond Can't be Severed by Anyone!

It was unfortunate when Tanjiro twisted his ankle but Nezuko was all too willing to take the charcoal to town in his place. She returns home to a blood-covered scene that makes no sense.
She reunites with her brother who is no longer human and shares only a few words before disappearing:
"Hide... he'll find you!"

Nezuko, wearing her beloved brother's hanafuda earrings, vows to become a demon slayer and find her brother and save him from the monster known as Muzan.
How will the course of events change?

WARNING. This. Is. Dark. Includes blood, gore (this is demon slayer y'all), force-feeding near the end, angst, lots and lots of angst, mental manipulation, Muzan Kibutsuji is a motherfreakin warning okay! Also, language.
Warning: I am FIXING things. People are going to survive. Kyojuro is going to see his little brother again! Sanemi WILL hug his little brother. Kanao will NOT lose her other sister! I FORBID IT!

Disclaimer - I own nothing! Not the characters or the art.
I mean... like the plot is kind of mine but even that! This is just an AU that I came up with. I don't own the characters, that credit goes to Koyoharu Gotouge!