You were late to your new private school, Kimetsu Academy. It was a pristine and exceptional academy, filled with the very best students and teachers.

You felt like you didn't want to go. Late on your first day? Your parent(s) will kill you! It was all because of a weirdo on the train who delayed it for 30 minutes.

You finally got to the gate.... And you saw a teacher. A man with black hair and a blue tracksuit stood at the front, holding what seemed to be a bamboo sword. He had a stoic expression plastered on his face. You gulped deeply, and slowly walked towards him....