"Demon Slayer: A Second Chance"

Those who should be dead are alive; there shouldn't be any more demons, but there is. Muzan was defeated, so how are demons still roaming? Tanjiro should be alive, but he is dead.

Mitsuri, Obanai, Muichiro, Shinobu, Gyomei, Genya, and Rengoku's last memory was where they died, but somehow, they are alive. They are unsure how this happened. They made a promise to find out how they are alive, but also not to waste their second chance at life.

Nezuko isn't the same since tanjiro was killed in the final battle, sacrificing himself to kill Muzan, who was controlling his body, and saved everyone..

While the Hashira are alive, there is a new breed of demons, able to walk in the sun. But things don't stop there; a new demon king has arisen.

And that demon king is Tanjiro, who is under the control of Muzan.

Au- a lot of things aren't manga accurate, but I try.

Mistake with spelling names