Prolong

A shrine maiden named (Y/n) comes across the most fearsome demon of all. Muzan Kibutsuji. Unknowingly knowing who the male was and injuring him the young maiden brings him to the shrine for healing.

But upon discovering his true intention the shrine where she once lived was destroyed. Her last living relative gone and a cursed placed upon her. (Y/n) I'd discovered by a newly certified Tanjiro Kamado and his demon sister Nezuko.

The three head out to kill Muzan Kibutsuji and cure Nezuko and lift the wretched curse on (Y/n). Along the way they meet new Demon Slayers and the Pillars along the way.