Daegun Kwon, a high school dropout, toils in a convenience store as he gears up to earn his GED. When faced with troublemakers at work, he stands his ground and catches the attention of a representative from the Education Foundation. Tasked with a unique mission called 'Designated Bully', Daegun seizes the opportunity for redemption. Embracing his role, he enters school not as a victim but as a force to counter bullies, aiming to bring peace back to the campus.