It's A Never Ending Story

This is a swap au, so Daki swapped with Nezuko, Gyutaro swapped with Tanjiro

zenitsu didn't really swap lives, he is now Kanao's brother

Inosuke swapped lives with Zenitsu, but he is still aggressive yet does not wear his boar mask

Shinobu swapped lives with Kanae

Aoi swapped with noone

And the rest of the Hashiras don't swap, unless you have a suggestion for who should swap with who

Everyone's Gender is the same as well, so only life swap, no gender swap. I hope this make sense, if not, it may make more sense in the story

Disclaimer : some things that happened in the anime, may not be added into the book

Hope you like the story, and if you do check out my other book 'Demon Zenitsu' or 'Demon slayer Pictures'
Also I'm bad at writing combat/fighting sences