[The familiar voice grabs his attention, but he stops himself from immediately responding like he knows her...which says a lot about how often he's been Nadeshiko lately (and how close Lisa and her have gotten, which is a bit nicer to think about).]

Yeah, it's good that something important like this didn't get forgotten.

[...huh. Now that he thinks about it, he's really has never met her as Nagihiko, has he...?

When she introduces herself, a look of apparent-realization dawns on his face.]

So you're the "Lisa-chan" I've been hearing so much about!

[He flashes a bright grin her way.]

Fujisaki Nagihiko. My sister's been bringing you up a ton, recently, it's great to finally meet you!