It follows the life of student Yoon 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. Yoon Ga Min, who looks like a model student but is a student of 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, Yoon Ga Min sits diligently at his desk with the goal of going to college. However, when his study group friends get bullied, Yoon Ga Min takes off his glasses and school uniform jacket to put his fighting skills to use. Lee Han Kyeong, Yoon Ga Min's teacher, dreams of seeing the school change for the better. Lee Han Kyeong tutored Yoon Ga Min during her university days and reunites with him when she is appointed as a temporary teacher, holding a secret.