The Devil’s Classroom

Kim Sang-an, a ruthless moneylender, finds his world shattered when his sister, a dedicated educator, is driven to suicide by her own pupils. Consumed by a need for vengeance, he infiltrates the school as their new homeroom teacher, determined to exact payment for the life they stole. Facing a class of truly monstrous students, he becomes a collector who will pursue this debt into the darkest abyss. Thus commences a savage and unrelenting battle between a man with nothing left to lose and the young demons who pushed him to the edge.