Ocs are polar opposites. Your OC is spoiled and cares about their looks, being popular and in lots of sports. They have the best car, best significant other, and they're the ruler of the school. 

Then there's Flame, she's the weird kid of the school, always dressing in black and cursing out the teachers when in trouble. 

The two don't get along whatsoever, usually arguing in the halls. Flame's keyed your OC's car and your oc has poured paint on her. The whole school seems to know about the fued going on between the two OCs. The teachers try their hardest to keep them apart until a new teacher has them paired for a project.