Demon Slayer: Revived on the Mugen Train from the Start

The day I died, the snow fell heavily, while my wife and child's cries were faint. My name is Tanjuro Kamado. I'm just a charcoal seller who can dance the Hinokami Kagura. When I open my eyes again, I see my son covered in blood, roaring at an Upper Rank demon. Behind him, the Flame Hashira's sword is crumbling inch by inch. Akaza's fist is already at Kyojuro Rengoku's throat. Upper Rank Three sneers. “Human, this is where it...” Before he can finish, a Nichirin Blade rests gently against his neck. The hand gripping it is gaunt and trembling, yet steady as a rock. “Sorry.” I cough twice. Flames rise from the blade, lighting up a fear in the demon's eyes that has not been seen for a hundred years. “Could you let my son... catch his breath first?”