Kang Hyunbeom, the vice-president of the school's disciplinary committee, has a new student in his class. From the moment he walks in, the transfer student gives off a dangerous vibe. He’s none other than Ban Taehyun, the delinquent who instigated a gang fight witnessed by Hyunbeom’s friend. Driven by his sense of duty as a disciplinary officer, Hyunbeom starts keeping a close watch on Taehyun. But as they continue to interact, the two slowly grow closer. Seeing this as a chance, Hyunbeom sets out to reform Taehyun into a model student. However, the closer Hyunbeom gets… the more Taehyun’s heart begins to drift in a different direction. Can this delinquent really be reformed without incident?