In an alternate Earth, humans called "Blazers" have supernatural abilities. These Blazers can materialize weapons known as a "Device" which are made through a person's soul. At Hagun Academy, Blazers are selected as representatives for the Seven Star Sword Art Festival, an annual tournament event held by the seven Mage Knight Academies in Japan to determine the strongest Apprentice Knight. This story is about a young man named Shirako Takamoto. Shirako isn't born a blazer nor is he from this Earth. He is the first non-blazer to attend Hagun Academy, but nobody knows that he is studying to become a doctor. Shirako only attends Hagun Academy to carry the family honor as a natural-born samurai.