In this AU you are Tanjiro's younger sister, and Nezuko's older sister. One day master ubuyashiki fainted, and the hashira's blame it on you. You are tied up, watching Sanemi Shinazugawa, the wind hashira kill your sibling, Tanjiro, and Nezuko, because all the hashira's think you betrayed them.

Obanai: Thats your punishment for betraying the corps, now what shall we do with you? Sanemi: I was right about you pathetic siblings!! Giyu: Traitor.