At chapter 5 si yi ming mentioned that "if he's living at ji zhou shan hai garden, how is he not able to differentiate between humans and demons?" doesn't that mean they see gu bai as a demon?
They have seem him as a cute little demon since the beginning of the story. And Gu Bai has seem them as normal humans. Gu Bai doesn't know he is around demons.
I think since he moved in. Remember the security guy, he said "what a cute little demon" They assume he knows about the building being a demon gathering apartment. What they don't know is that he's a cute dummy not knowing what the demons do is something that a normal human will not do. (▰˘◡˘▰)
Here I thought I'm the only one who's rooting for hyunha. But soon i give up cuz it's predictable who's the ml is