Champion (n) : a person who fights or argues for a cause or on behalf of someone else

Definitions from Oxford Languages

Dylan Lee who was a victim of bullying in his whole middle high finally got a chance to live his life again when he transferred in Seoul Techno High. Not until, the tyrant, Simon Park who destroyed his life get to study at the same school as his in his senior year. Together with his friends, will Dylan Lee be able to get along with Simon Park and got a good use of him in addressing the violence in their school, or will he be just another victim like he always was?