[ He raises an eyebrow at the statement, pondering the boy in front of him thoughtfully. ]

So your roommates are causing you trouble.

[ Well, that's a little more understandable. True that he shouldn't be out and about in the first place, but now that he's equipped with the reason he can spare at least some sympathy. ]

You could have a word with your head of house over it, in the morning. See what they can do about it.