Beginning of journey (Part -1 )

Hello Dear friends ,
In this story tanjiro is actually blood related to Yoriichi tsugikuni but their surname were changed to kamado and breathing technique was turned into dance to pass it from generation to generation due Muzan's threat it was all kept secret by kamados. Yoirichi was able to save his son but not his wife. His son and descendants were immune to demon slayer mark's curse. After yoriichi's death his sword was taken by Kotetsu's ancestors and was fitted in yoriichi type zero doll. And the main ships is Tankana.

lets continue the story!!