That pause, before Naoto answers—that's important, Yousuke thinks. It's an opening, a weak spot to poke at. Yousuke even knows what to say: "So where are they?" "Did you put them in yourself or did the place come with them?" "Come on, are you seriously telling me you don't use them yourself? What's the point of a secret passage if nobody uses it?" Except—
Except that's dumb. Why needle Naoto? What would chipping away at his composure get him? A laugh?
Yeah, right. A laugh, and then a boot out of the mansion. He'd like to stay employed, thanks.