A boy named Tooru Kokonoe decides that after losing a loved one in a terrifying incident he wants to become stronger and enrolls in a special school where people manifest their souls as weapons called Blaze. Tooru is capable of producing his own Blaze but for some reason it manifests as a shield instead of a weapon. Moreover, he enrolled in a school that teaches combat skills and thanks to the school's Duo partner system he ends up living with a beautiful silver-haired girl.