Park Jimin is the definition of Teachers Pet. He is always doing his homework and turns it in when it has to be, he is always following the rules, he is never late, he listens to the teachers, and hates the newly transferred student Mark Tuan. On the other hand, Mark Tuan is the school's bad boy. He never does his homework and neither turns it in when it's due, he never follows the rules, he is always late, he never listens to the teachers, and he likes to tease Jimin.