In a world where magic is a codified science, social status and magical aptitude are determined by rigorous academic testing. At the prestigious First High School, siblings Tatsuya and Miyuki Shiba enroll, only to find themselves separated by the system's rigid hierarchy: Miyuki is hailed as a prodigious "Bloom" in the top-tier Course 1, while Tatsuya is relegated to the "Weed" of Course 2, deemed an irregular for his lack of visible magical finesse. Yet, beneath Tatsuya's placid and seemingly inept exterior lies a devastatingly powerful and unorthodox technician, whose true capabilities are a closely guarded secret. As political intrigue and terrorist threats begin to swirl around the school and the nation, the siblings are drawn into a high-stakes conflict that blurs the lines between magic, military might, and family loyalty. This sci-fi action series blends intense magical combat with a complex narrative of class division and hidden power.