In the world of magic, there are deadly techniques called spellblades, shrouded in mystery due to their lethality. The prestigious Kimberly magic school welcomes new students, including Oliver Horn, who becomes fascinated by a girl wielding a Japanese sword. As threats emerge and endanger the student body, Oliver discovers dark truths about the academy. Nanatsu no Maken ga Shihai suru follows the intertwined fates of two warriors.
Original title: Nanatsu no Maken ga Shihai suru