Tsutomu Satou (佐島 勤, Satō Tsutomu) is a Japanese light novel writer. He is affiliated with Straight Edge. He is best known for writing the light novel The Irregular at Magic High School.
In a world where magic is not a fairy tale but has existed for one hundred years siblings Tatsuya and Miyuki Shiba prepare to begin their studies at the elite Private Magic University Affiliated High School (Magic High School for short). Entering on different levels of the academic spectrum the two turn the once peaceful campus into a chaotic one.
In the story, the seasons have changed and it will soon be the second spring. Tatsuya and Miyuki have finished their first year at First Magic High School and are on their spring break. The two go to their villa on the Ogasawara Island archipelago. After only a small moment of peace a lone young woman named Kokoa appears before them. She has abandoned the Naval base and she tells Tatsuya her one wish.
A century has passed since magic - true magic, the stuff of legends - has returned to the world. It is spring, the season of new beginnings, and a new class of students is about to begin their studies at the First National Magic University Affiliated High School, nickname: First High. It follows the events of the original series as seen through the eyes of Shiba Miyuki, Tatsuya's sister. The life of an honor student comes with a lot of expectations...and unexpected hidden feelings?!