Kamado Yuki is Kamado Tanjiro and Kamado Nezuko's oldest sister who they thought is dead. But what happened if Yuki is not dead and come back to them as a demon? A demon that didn't kill or devouring human but still the strongest? Stronger than Kitbusuji Muzan himself. What will Tanjiro do? Notes/Warning : - Might have some Jujutsu Kaisen crossover. - Might contain some spoilers. - I changed some events and add more my own characters so that I don't really spoiled the manga.