D. Slayer | He woke up

Ubuyashiki Kiriya's splendid leadership with the help of his father, Ubuyashiki Kagaya- who excels in calculation and strategic plans for demon slayer and later used himself as a bait to weaken the progenitors of demons, Kibutsuji Muzan.

The slayers were sent to infinite castle, where they were scattered and fought with the upper moon. After killing all upper moons, Kamado Tanjiro found himself fighting along with his friends and hashira's against Muzan.

They managed to kill him and end the endless nightmare of demons, but there was one thing they couldn't foresaw. It was the death of Tanjiro.

Tanjiro was able to remove Muzan's blood inside him when the sun hit his body, but unfortunately, his cells also died along with Muzan.

When they thought he was dead, Tanjiro woke up the day after his family was slaughtered.

With a new chance given to him, Tanjiro rewalked his past and creates a new change that causes a butterfly effect.

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Own plot.