gyutaro and ume

Intro ume is still a demon but gyutaro is human this is a au where they are tanjiro and nezuko gyutaro just wants to protect his sister and make her human and he has blood breathing and uses sickles as weapons ume is a demon wears a muzzle and her demon blood art is obi but now she is a demon that wants to help her brother and there is also nakime and rui and there is also you nakime is your girlfriend