Ray White has inherited the title of "Ice Sword Magician", which is said to be the strongest in the world. Three years ago, he suffered a deep wound in his heart and left the battlefield. However, because he is from the only ordinary family in the school (ordinary), he is looked down upon by a magus from aristocratic background, and soon begins to become isolated as soon as he enters the school. At that time, he meets Amelia Rose, the daughter of the Rose family, who is the head of the three major aristocrats, and Elisa Griffith, a half-elf, and begins school life with new friends.

Helena Grady has discarded her teacher disguise and reveals that she is a member of Eugenics, an organization trying to get sorcerers brains. Faced with her reckless onslaught, Ray is finally forced to face her as the Iceblade Sorcerer. As his friends look on, the battle is decided! Then, time leaps backwards 10 years. A young Lydia discovers a war orphan during her battlefield patrol. His name is Ray. Slowly, the mysterious past of the Iceblade Sorcerer is unveiled.