As a highschool student you saw a lot of stuff, and the worst and most annoying of that 'stuff' was a troublemaker..Arataki Itto 'The One and Oni' he would say..

You were taking books from your locker when suddenly somebody taller than you took your book into their hands

"Ha, shorty~"

It was ofcourse, non other than Itto, teasing you with a smug and teasing smirk as he held your book high in his hand