Cygnus Maidens: The Irregular at Magic High School

The year is 2095. Magic has been tamed as another form of technology, and the practice of magic is now a rigorous discipline. Brother and sister Tatsuya and Miyuki Shiba are just about to start their first year at the renowned First Magic High School of Japan. But the school's ironclad rules mean that the brilliant Miyuki enters the prestigious Course 1, while her older brother, Tatsuya, is relegated to Course 2--and that's just the beginning of their troubles! (Source: Yen Press)

The novels are set one year after Tatsuya and Miyuki graduate, and center on two girls named Arisa and Marika. Though raised as sisters, Arisa is one day entrusted to the elite Jumonji magical family, separating them for two years. Now, both are enrolled at First High School, and finally reunite. Based on the light novel of the same name.