He makes eye contact with Cas and Cas takes out an earbud
Cas: Hey asshole, you got a problem?
Cas: Then why are you looking at me? You a perv?
He grins at Ren
Cas: Heh~Nah, I don't think so...
Cas: H-hey! W-where you going?
Cas: Well-I-I don't. Bye-
He looks away