[......yeah, she's too obvious, but still. Lisa's not used to having nice things, she defaulted to "I have another meeting in ten minues". Mind, it'd have been nice to have an excuse to get to know Hibiki in a structured social setting anyway. So Ai deciding she has time in her busy schedule...]

W-well, of course you are... um, yes, we'd be happy to have you! [She feels zero reservation assuming on this one; Hibiki is not subtle.] Man. I wasn't expecting... [Nah, not worth trying to dig out here. Shaking her head as she trails off, Lisa just relaxes a little, eyes brightening.] Eh, it's fine. Let's have a good time!

[She pumps a fist in the air; despite her earlier nerves, she is excited, both about the Unit and about their impromptu karaoke trip.]