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~
Cas: Mhm~
He giggles, turning over and raising his ass towards Elden
Cas: A-aahhh! Y-yes master, sorry! I will be a good boy...