The students taking the class are these (blond squad hehe). Bakugo demands to know what are they trying to correct from him. Iida as the class prez says he has to keep everyone on the right track so he has been thinking ab this for a while...

-Bakugo-kun, don't you think your words and actions are always overbearing? -Don't complain about shit! -Kaminari-kun, isn't the way you act a bit thoughtless?! -Eh? isn't that normal? -You'll do some introspection and learn some manners befitting to UA students!

So why is Aoyama here? "I have a fixation on table manners☆" The villains are having a hard time carrying the scrolls. They have to take them to their car to escape but the students arrive asking for lessons, making them panic.

"what are we gonna do? that one looks like the guy from the Sports Festival. We can't win against them." The villains trick them into running 10 laps around the town to make them waste time and get tired. "Does that have anything to do with manners?" "It's sports-oriented!☆"

Iida goes into this deep ramble a la "When in Rome..." bc ofc these instructors would know what they're talking ab. Checking the city is the first step toward learning manners, yes! Bakugo is not interested but Iida insists, they gotta do it together "Let me go, shitty glasses!"