It's been a century since "real magic," which was once supposed to be only myth and legend, became ubiquitous technology throughout the world. First National Magic University Affiliated High School (First High), one of Japan's nine magic schools, accepts two talented brothers, Miyuki and Tatsuya Shiba. Based on admission test results, First High divides its students into two groups: Course 1 and Course 2. The Course 2 students are called "Weeds" by the Course 1 students, who prefer to call themselves "Blooms." Tatsuya is enrolled to Course 2, while his sister Miyuki is admitted as an honor student to Course 1. Miyuki aspires to demonstrate to First High that, despite being classified as incompetent, her brother is one of the finest magicians in the world.