Cas: Nnng-n-no! I don't wanna behave!
He holds back a moan
Cas: A-ahhh! T-too hard!
He moans loudly
Cas's eyes go light pink
Cas: Mhhh-m-master...I-I'm sorry...I-I've been bad...p-punish me-please...
Cas squirms
Cas: Master...I've been such a bad boy...I'll be your plaything now-you can do whatever you want with me~
Cas smiles at Elden
Cas: Yes master~
