AT: What if... (angst)
Good news; Kanao and Muichiro might be added to this story^^

Tanjiro
You got turned into a demon
and he's forced to kill you

Nezuko
You almost found the cure
but Nezuko sacrificed herself
to rescue everyone's life

Zenitsu
Shinobu couldn't reach in
time to save Zenitsu
from turning into a spider

Inosuke
Couldn't make it out
alive from the house
(The one with the
drum demon)

Giyuu
Killed Nezuko before
Tanjiro could protest

Shinobu
Got caught in the
spiders' poison
bubble thing

So sorry if this wasn't really well made. I wanted to put some other scenarios but they are !!MANGA SPOILERS!! The next one will contain spoilers.