You and Charles hate each other, as he was always smarter and would always embarrass you, you tried to do one up him, but that time didn't end well..

as you walk through the hallway, Charles bumps into you.

"oi, watch where you're going!"

he yelled, people are watching now. You got mad and pushed him, which made him push you back, until you both started to fight. Leading Charles with a bleeding nose, and you had a bruise on your eye, same going with blood on your nose.