[He doesn't comment on the remark about his look, but his gaze gets sharper the second Hiyori closes off.

That's...

He leans back a little, folding his arms and limbs relaxed, but the sharpness doesn't lessen.]

You might be a teacher, but you're a transfer student as well. It goes without saying that we don't play by the same rules as the non-transfers around here, right? [The way the non-transfer students become shadow students, for one.] Were you alone in there, or did anyone else happen to be with you before you went to the student council room? What had you been up to in there before you noticed the note?