Magic is a product of neither legends nor fairy tales, but instead has become a technology of reality since a time unknown to people. Supernatural power became a technology systematized through magic, while magic became a technical skill. A "Supernatural Power User" became a "Magic Technician." Magic Technicians (in short, Magicians) are nurtured through Magic High Schools and Universities. 
 
This is a story about: 
 
Tatsuya, a defective elder brother low achiever. 
Miyuki, a perfect, flawless younger sister high achiever. 
After both siblings entered a Magic High School, 
The stage of daily turbulence was unveiled—.