Genya and Sanemi

*so you were a demon but a kind one like Nezuko you didn't hurt anyone and you had a bamboo with roses muzzle on so you couldn't talk and one day you were sitting on a roof looking at the night sky till a sword and a bullet flew past you* Sanemi:well well well Genya looks like we have another demon Genya:I guess so nii-san *Sanemi and Genya are siblings btw*