Gaias, a world where magic exist. In this world, Humans, Demi-Humans, Demons, Monsters, etc., coexist with each other. Because females are much more capable of wielding and using magic, a highly talented male magician can barely compare with a female magician of average level. Because of this, most of the magic institutions have an "all-girls" policy, where only females are allowed to attend as students, teachers, and staffs. The Ordesia Royal Magic Academy, The Ordesia Kingdom's only private academy, is an academy mostly composed of nobles and talented female magicians. But they've never had a male in the school. Neither students, teachers, nor staff. One day, while our main character was submitting his recent quest in the Adventurer's Guild, the receptionist gave him a letter, saying it was for him. After receiving the letter, he head out. After reading the contents of the letter, he was shocked. This marks the day where his life will begin to go to unexpexted ways.