I'm tagging error as Rinnosuke's glasses is rimmed but suddenly becoming semi-rimless on the 5th panel. I guess the eyes DO have it here.
It's not error. It's to show Keine's eyes. Intentionally. So, not error. Taking off the tag.
guides us in the right direction.This liar...!slipTo be frank, there's no way a diligent person such as yourself can be a bad teacher, Keine-Sensei.
You can do no harm.That's why you shouldn't think too hard about it and keep teaching as always.
I'm sure you'll do fine.
...ThisThat is how all teachers work.That is the kind of teacher you are....A teacher always...