"... Er. I'm sure it's... just a matter of time, that's all." Though it's definitely worrying... he's just trying to keep a happy appearance for his students' sake.

"To be frank, I wouldn't mind if anyone decided to skip my class for today; I'll likely be taking it as a break for myself as well."

Here, he pauses, clearing his throat again before continuing, "In fact, if it ends up being simply you and I... you're free to go about whatever you'd like."