you’re a teacher in kimetsu academy,you teach english,you have this one student, shinobu, skipped your class yesterday,how do you know she skipped you class instead of not being there for the school day,you ask her sister,kanae kocho, the biology teacher, now a day after that,you’re teaching your class and you see shinobu,you made a mental note to talk to her after class

skipping class wasn’t like her, she’s a straight A student,she almost has no academic rivals