why do I try to do tags when I'm half-asleep
Thank you very much. [For complimenting his tea-brewing skills, and for allowing him to speak freely.]
In that case... [He's planned how to do this in advance. The vampire event was fun for no one and he figures she won't enjoy being reminded of it, but at the same time Sebastian can't not acknowledge it. Better not to start off with apologies about bringing up unpleasant memories. He sinks down on one knee before her, but his smile is gentle, his tone pleasant even as he deferentially lowers his gaze.]
Your Highness, as the person tasked with protecting the young master against anything that might threaten him, please let me express my deepest and most sincere gratefulness to you.