It probably is... It's late at night and they wouldn't want anyone to be sneaking in and stealing tests.

[ He would normally not provide this kind of example, but he knows students who would actually do that, so... Let's leave it at that. Daisuke looks around. ]

Maybe they left a window unlocked by accident? I don't know how to pick locks yet... [ Speaking of which. ]

Did you ever get to learn it from Kyouko yet?