In the early 21st century, magic has evolved from myth into a codified science taught as a specialized subject at various educational institutions. First High School, a renowned academy for aspiring magicians, segregates its student body into two factions based on entrance exam results: the high-scoring "Blooms" who join the First Course, and the "Weeds" who are assigned to the Second Course. The narrative centers on siblings Tatsuya and Miyuki Shiba as they enroll at First High School. Following their examinations, Miyuki's extraordinary aptitude earns her a place in the First Course, whereas Tatsuya is demoted to the Second Course as a "Weed" due to his lackluster practical performance. Despite this classification, Tatsuya harbors profound theoretical insight, exceptional martial arts skills, and distinct magical capabilities, establishing him as a true irregular within this structured magical society.

In this installment

Following the Scorched Halloween incident, the world learns of a Strategic-class magician with overwhelming power. In response, the United States of the North American Continent sends its elite magician unit, Stars, led by Angie Sirius, on a covert mission to Japan. At First High School, Tatsuya Shiba and his friends hold a farewell party for Shizuku Kitayama, who is leaving for an exchange program in the USNA. Her replacement turns out to be the striking Angelina Kudou Shields, known by the nickname Lina. Meanwhile, Tatsuya discovers that the USNA is trying to uncover his true identity. In Tokyo, several corpses drained of blood are found, initially blamed on a vampire. Tatsuya quickly pieces together the evidence and concludes that these attacks are likely not unrelated.