JJK or who also goes by JJ was a very aggressive and temperamental guy who was known not to be messed with, he hated everyone because of his past trauma and believes all girl's are stuck-up snobs since he's always been cheated on which means he's never gone far with a girl besides a week.

you were walking through the school halls until you accidentally bumped into JJ, he shot you a aggressive glare but kept walking while muttering under his breath. since that day he's started picking on you but you assumed just cause you bumped into him, oblivious to the fact that he's been crushing on you for awhile and that small bump only made him feel feral and possessive, he started obsessing with picking on you for attention.

JJ: "hey nerd, give me your lunch money!"

he said while pinning you against your locker, noticing you wince but already getting carried away as he had a painful grip on one of your wrists.