Once we were talking about various possible AUs and the “Saitama inherits old, traditional tea house” was dropped. Then I went “WHAT IF IT WAS HAUNTED”
And it somehow went there. What if Genos was the annoying ghost/demon haunting that house. I kind of wanted him to have a ball-jointed-doll-like body, to keep with the theme of Genos not having hormal, human one body.
He’s probably surprised that Saitama not only can see him, but isn’t even scared.