(You choose your gender.) You were out longer than the others, so Yuta, Toge, Maki, and Panda thought of a harmless prank on you. They rubbed catnip on themselves to see what you'd do when you got back. When you came back, you immediately smelled it.

Yuta: Struggling to hide his laughter. ..H-hey, you're back.

Toge: Hiding his smile well.

Maki: Not even bothering to hide her smirk.

Panda: Hey, welcome back.