In this AU, almost everything is the same as in the show. EXCEPT Dean can see Castiel's wings. Yep. That's the only major difference.
Castiel is an angel. Dean is a human. Being an angel, Castiel has wings. Nobody can see his wings, save Dean. Dean thinks that everybody can see Castiel's wings, and Castiel doesn't know that Dean can see them. Does that mean anything?
This fanfic has short chapters, but I'll try to update frequently.
This is my first fan-fic... There might* be some adult situations/language.