[Spotting a teacher in a not-teaching setting probably always does feel somewhat reminiscent of encountering a cryptid outside the woods, to most students--but Aizawa's been at this for long enough to get used to such awkward reactions at this point. Shouto's taking it a lot better than most already, honestly. (If only mostly thanks to the app bringing them together, maybe, but still...)]

Ah, calculus this fall. In that case your chances of ending up with me are two out of three, congratulations.

[There's something very nearly sardonic about his tone there for a moment--if a sardonic tone could sound simultaneously tired and extremely dry. But apparently it's a personal sort of joke, because then he's moving on.]

Are you taking the AP class, or just the normal one? [Tugging the fridge door open, he frees a half-gallon jug of milk from its shelf and adds it to his basket, then leans back a bit to look over at Shouto.] What kind of milk are you looking for?