rewrite the path

The final battle between demons and demon slayers was bloody and a lot of deaths from both sides, but when muzan and six slayers are the only ones left standing and their fight ends and muzan won. What if the six slayers are sent back to the past before kanae died and tanjuro family is alive and with the memories of the final battle. Will they be able to change who wins will tanjuro, nezuko, uzui, sanemi, genya, and gyomei change fate and demon slayers win the war or will the demons win again. Tanjuro stays with his family until his family death, but he would be ready and a hashira would be there from a day ago. Will these people save the world? or will they die before muzan again. My au and I don't own demon slayer or character from demon slayer and I only own my oc.