Maybe she's shy around boys...

[Poor Yukiko. She can't help but laugh, though, bumping her shoulder companionably against his.]

It's nice to meet someone else who's heard of Gekkoukan, though. I just finished my second year there. [Sort... of.... well, the year is definitely finished, and she won't be starting her third, but, you know, details.] There's no school here though, so don't worry.