[Guren is looking more irritated the more Yuu goes on. His hand pulls out of his pocket to curl into a loose fist, but he doesn't whack him, this time.]

I just told you it can mess with your head! That includes your demon, you idiot! [Ugh. He's so tired.]

Look. You're to report to me before you try anything smart in this place, got it? Don't run off, don't go anywhere alone, and that includes with your demon. Always check with me beforehand.

[So strict. He's being protective...]