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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.