The is an alternate hypothetical where tanjiro is a descendant of Yorichii

In this story, Yoriichi's swordsman skills are reincarnated into Tanjiro since birth. He has the same birthmark as him, and the rising sun earrings. Since he had lots of stamina ever since a small child, he started doing the Hinokami Kagura dance in place of his father, so he already knows how to perform all 12 forms easily. Tanjiro doesn't know the extent of his abilities so when coming home one night and finding his family massacred, he seeks revenge on whoever destroyed his family. Little does he know he wouldn't need to put much effort into becoming a Demon Slayer. [All credits go to the respective owners of their creations. Everything in relation to Demon Slayer/Kimetsu No Yaiba is owned by Koyoharu Gotouge] //TRIGGER WARNINGS: THIS STORY IS VERY GRUESOME AND HAS A LOT OF GORE AND A LOT OF SWEARING ALSO THERE MAY BE SOME MANGA SPOILERS// THIS STORY HAS YET TO FINISH, AND WHEN IT DOES IT WILL BE REWRITTEN TO FIX ANY MISTAKES {縁壱の炭治郎への転生}

Instead of Gomu Gomu fruit, Luffy eats the Storm fruit (Arashi Arashi no Mi). With the power of Storms in his hands, Luffy will turn the World upside down. Rated M for sexual content, violence and cursing. Different-DF-Luffy. Harem.