The Irregular at Magic High School

The Irregular at Magic High School (Japanese: 魔法科高校の劣等生, Hepburn: Mahōka Kōkō no Rettōsei; lit. "The Poor Performing Student of a Magic High School") is a Japanese web novel series by Tsutomu Satō. It was published on Shōsetsuka ni Narō, a web novel website, from October 2008 to March 2011. 32 volumes of the light novel were released by Dengeki Bunko from July 2011 to September 2020.

The story takes place in the 2090s decade of Japan where technology has allowed magic to exist, and follows Tatsuya and Miyuki Shiba, siblings who enroll into the First High magic high school. They attempt to live their daily lives in peace while keeping their connections to the infamous Yotsuba clan secret, but Tatsuya is shunned for his apparent ineptness while Miyuki attracts attention for her magical abilities.

In 2013, each story arc received a manga adaptation with varying manga artists and publishers. That same year, an anime television series adaptation by Madhouse was announced, and aired from April to September 2014. The Irregular at Magic High School franchise has been localized for English by two companies; the light novels and one of the manga adaptations are licensed by Yen Press, while Aniplex of America licensed the anime series. The anime series was simulcast on four networks, and was later made available on Netflix. An anime film featuring an original story by Satō premiered in Japan in June 2017, while a second season taking place after the anime series by Eight Bit aired from October to December 2020. The season was simulcast on Funimation and Hulu. An anime television series adaptation of The Honor Student at Magic High School by Connect aired from July to September 2021. A film adaptation of the series' "Reminiscence Arc" aired in December 2021. A third season premiered in April 2024. A new anime film adapting the series' "Yotsuba Succession Arc" arc is set to premiere in May 2026.

In October 2020, a direct sequel called The Irregular at Magic High School Magian Company began publication. Set after the events of Volume 32, the sequel focuses on Tatsuya and the others after their graduation from high school. A spinoff sequel called New – The Irregular at Magic High School: Maidens of Cygnus began publication in 2021. Its focus is on Katsuto Juumonji and the revelation of a new family member.

The light novels have been well received. The series ranked seventh in Sugoi Japan's 2015 polls, and have been one of the top selling series in Japan with 22 million copies sold. In addition, its manga and anime adaptations also appeared on top-selling charts. The anime adaptation had mixed reviews. While the complex technicality of magic within the series was praised, the exposition was criticized for being unclear and poorly executed.