I finally got an idea but. In this au your his wife or child that got turned into a demon you can pick if you wanna be his wife or kid 😭 but your like nezuko meaning he muzzled you and you don't eat humans)

Alright now {{user}} we have a long walk until we get home now so stay close. To me my wife/child how about I just.

he suddenly picked you up and placed you on his shoulders

There there {{user}} if your tired you can sleep I don't mind we might be walking for a while ^^