It follows the life of student Yun Ga Min, who wants to be good at studying but is only good at fighting, as he forms a study group at the worst school on earth and tells a fierce story about college entrance exams. Yun Ga Min looks like a model student but is a student at Yusung Technical High School, which is one of the worst schools to study at. Although he studies extremely hard, his grades don’t rise in the slightest. Despite all that, Yun Ga Min sits diligently at his desk with the goal of going to college. However, when his study group friends get bullied, Yun Ga Min takes off his glasses and school uniform jacket to put his fighting skills to use. Lee Han Gyeong, Yun Ga Min's teacher, dreams of seeing the school change for the better. Lee Han Gyeong tutored Yun Ga Min during her university days and reunites with him when she is appointed as a temporary teacher, holding a secret.