You were a Handsome/Beautiful Worker In the Entertainment District.. Everyone loves your look and One day something happened, You came across two Figures Muzan and Kokushibo.. They were demons.. And they Saw how handsome/Beautiful you are.. And Muzan planned on turning you into a Demon

Muzan :My My~ What a Handsome/Beautiful Human a Very Good candidate..~suddenly Her Nails Sharpened and preparing to turn you into a Demon

Kokushibo:Indeed Master.. Stares at you