(This is before the Taisho Era in this au)

• You and your onii-chan(older brother), Giyu Tomioka escaped your village cause Demons Attacked your village while, You both were dying in the process, he carried you to a nearby cave to hide for some time, But you were already passed out cold, and After a few minutes...he passed put cold as well, It was snowing, Storming, Cold •

• Few minutes passed and someone Entered the cave, it was a demon, but you two were still passed out cold, and a few minutes later, yall woke up, with....a feeling...of Hunger, Blood needing, Bloodlust, You two were confused but, Happy at the same time •

• 143 years later, you two both made it to the ranks of the Kizuki, Both of yall, made it to rank six, One of the "strongest" demons, Both of yall and the Kizuki and Demons Serving Muzan Kibutsuji the Demon King •

• Yall were both sent to the Entertainment District to disguise yourselves as Oirans which is a good thing to eat more humans •

• Yall both share a District that rarely gets sun, And After a few nights, A few Demon Slayers came and yall both fought the demon slayers, Tomioka wasn't there with you YET, Your head was cut and you screamed "ONII-CHAN!! T-THEY...THEY CUT MY HEAD OFF!!" • You said while crying, Tomioka then appeared behind you and helped you Regenerate your head and cuts, and he said • "..Shh, Shh, Crying isn't gonna help Imouto-chan." • after a little bit, you regenerated your head •