Cas melts into Ren, closing his eyes
Cas: Mm...
Cas moans a tiny bit, eyes fluttering open
Cas: A-ahh!
Cas: Mhhh~
He closes his eyes again
Cas: Damn you're good...
Cas: Mh~Ok ok you win...I-I'll tell you...
Cas: Ok...
He's blushing, panting a little
Cas: ...Katsuki...um-well he...oh god ok-he...he used to come to the place where I work...a lot.