In the 21st‑century global community, magic has finally been systematized and elevated to a new level. Those capable of using magic after completing nine grades in Japan now await admission into magic schools—but only if applicants pass the exam. The quota for entry to the First School (Hatodji, Tokyo) is 200 students; a hundred of the best are admitted to the first division, while the rest are placed in reserve for the second division. Moreover, teachers are assigned only to the first hundred—the "Flowers." The others, the "Worms," study independently. In the school there is a constant atmosphere of discrimination, as even the uniforms differ between the two divisions. Tatsuya Shiba and Miyuki were born 11 months apart, allowing them to study in the same year. Upon entering the First School, the sister finds herself among the Flowers, while the brother is among the Worms: despite his excellent theoretical knowledge, he struggles with the practical part. In short, we are in for the studies of an average brother and a decent sister, along with their new friends—Erika Tiba, Leonhart Saijo (just Leo), and Midzuki Sibata—in the magic school, quantum physics, the Nine Schools Tournament, and much more.