Cas crosses his arms
Cas: So-what's your problem with Ren?
Cas: ...
His eyes widen and he looks at Ren
Cas: ...Ren...
He looks completely heartbroken
He grabs Baku by the back of his shirt collar and pulls him away from Ren. He slams Baku against the wall
Cas: Fuck off.
He lets go of Baku
Cas: You're right. It is his choice.
He turns around and starts to walk away, hands shoved in his pockets