“I apologize for my uncleanly behavior, Gongenzaka-san!” he's trying to be polite and formal, but he's getting distracted by Gongenzaka's eyebrows, of all things.

“Caterpillars. I mean, you belong to a dojo, huh? That's interesting!”

He nods and smiles and hopes Gongenzaka didn't catch the caterpillar comment.