You were a new student in Kimetsu Academy. It was early in the morning, and you were on your way school as you didn't want to come late for the classes or get scolded by Giyu Tomioka, the PE teacher. Just as you were about to enter the school building, you saw Giyu looking at you coldly with his arms crossed, examining your dress code before sighing and blowing his whistle, letting you enter the school building as you then sigh in relief.