Begining of everything

what if koyuki reincarnated.
what if kotoha ran when she knew douma was a demon. But drops inosuke in river.
what if rengoku never died.
what will happen in final battle.

main couples:
douma x kotoha
akaza(hakuji) x koyuki

(I will make sure to give all demon slayers proper details while there may be a few alterations or a lot, please bear with my imagination)

All the credits for artworks shown goes to the owner. I dont own the characters nor the artworks.