Unperceived Fate

A different timeline. A different choice. A different outcome. Or, in which, in another universe Michikatsu did not become a demon and lived until 25 and died peacefully. And after a few decades, his younger twin brother, Yoriichi, joined him in death. But their story didn't end there, as they both got reincarnated in the Taisho era, into the original storyline, where Michikatsu DID become a demon. Now they are not Tsugikuni brothers. They are the Kamado twins. Older brothers of Tanjiro Kamado. How will this play out?