The Irregular at Magic High School: Reminiscence Arc is a special anime that premiered in winter 2022, produced by 8-bit.

About the production: the story comes from a light novel, there is 1 episode of about 71 minutes and its current status is "finished".

Its main genres are action, romance, sci-fi and supernatural, with themes such as Magic, Heterosexual, Military and Incest.

On AniList, The Irregular at Magic High School: Reminiscence Arc has an average score of 75%, a very good score, and appears on 35,361 users' lists.

The franchise continues in or follows from: Mahouka Koukou no Rettousei.

April 2095. A century has passed since magic was established as actual technology. The two siblings enroll at a prestigious school for magicians called the National Magic University Affiliated First High School, better known as “Magic High School.” Tatsuya, the older brother, is an “irregular” with a fatal flaw to his magic powers. The younger sister, Miyuki, is a star student with unmatched magical talent. Though they are now close enough to be mistaken as a couple, just a few years ago, the two had a dysfunctional relationship, where they were nothing more than a master and servant. One incident, however, alters their relationship forever. Three years ago in Okinawa, an unforgettable experience turns their souls and destinies on their heads. (Source: Funimation)

Official synopsis from AniList.