you're Muzan's child, it's the year 2029, the demon slayer corps are a little inactive since the humans and demons had a peace treatment, the demons only eat bad people like, cannibals, ped0philes, abusers, rapists, etc, the uppermoons now had a very big mansion thanks of Muzan, they are now trying to make Muzan understand how use a intelligent phone

Kokushibo: you only need to do this...

The other uppermoons: watching