Kimetsu no Yaiba is owned by Koyoharu Gotōge. Tanjiro and Kanao were in the same mission in battle. Unexpectedly, tragedy had come to face them. The infamous pillar Tanjirou was demonized and now had to obey the demon leader's orders. Promise broken. Warning: SPOILER (don't read if you haven't read the manga yet) Expected OOC. Reference from a Doujinshi.

Kanao lived in a broken household until two strangers rescued her one fateful day. No matter what they do Kanao can't seem to forget the horrors that transpired in her time there. She and her new family try to defeat the 'demons', an evil corporation run by Muzan, however, Kanao meets Tanjiro, a normal boy that she just can't help falling for. (ModernAU) Disclaimer: I do not own Kimetsu No Yaiba nor do I own the characters. This is fan fiction and is not in any way canon to the franchise.

Tanjiro, Inosuke, and Zenitsu were rescued by Shinobu and Tomioka after their mission on Mt. Natagumo. While the three swordsmen are taking their sleep, a sudden noise and a blinding light sent them to a mysterious room alongside with the Hashiras and their swordsmiths. What would they react to see Tanjiro's previous life and how he became one of the greatest Demon Slayers in the present.

What would happen if the Dance and the earrings weren't the only things that were given to them by the first sun breather, what would happen if the Kamado family had yoriichi's nichirin blade. But not only that but what would happen if Tanjirou had learned the way of the blade and the dance of the sun at the age of 7.