A familiar, thin figure was standing at the doorway.

He wore a yellow and black square haori, and his long, deep red hair was unusually tied in a high ponytail.

He was holding a katana that he had never seen before.

That was the back view of his father, Tanjuro Kamado.

And facing Tanjuro face to face.

It was a man Tanjiro had never seen before, dressed in a black suit and wearing a small top hat.

Because Tanjiro fell in the snow, he couldn't see the expression on his father's face, who was turned away from him.

But he was able to see the other side.

—The man in the black suit, his red eyes revealing a look of horror.

That was an expression as if he had seen a ghost.

Natural markings + natural transparency + complete sun breathing = Muzan's new father

(Not a time travel story, the protagonist does not know the plot)

Chiba Yang, whose everything was taken away by the demons, joined the Demon Slayer Corps at the invitation of the Flame Pillar and became the stepson of the Flame Pillar. From then on, all the demons ushered in their nightmare.

The protagonist is a descendant of the Jigoku clan. He looks very similar to Yoriichi. He comprehended the Breathing of the Sun on his own and created his own sword skills.