The implementation of the Reminiscence Arc based on the light novel series by Tsutomu Sato was already announced earlier this year. Yesterday, it was confirmed that the anime will be released this year. No further details are known yet.

Aniplex describes the story as follows:

In April of the year 2045, about a century has passed since magic was introduced as a technology. Two siblings are admitted to the National Magic University Affiliated First High School, commonly known as "Magic High School," which trains magicians. The older brother, Tatsuya, is an inferior student with a fatal flaw as a magician. The other is the younger sister Miyuki, a model student praised as a perfect magician. The two are so close that they are sometimes mistaken for a real couple, but until a few years ago, their relationship was as cold as that between a mistress and a servant. There was an event that changed this relationship. Three years ago in Okinawa. The event that Miyuki will never forget changes their hearts and their destiny.