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.

Despite being baptized by aristocracy, Rei started life at the academy. Rei, who is determined to do what she wants to do thoroughly, wants to work in both the Environmental Research Department and the Gardening Department. However, she was refused entry by the "Gardening Club" on the grounds that she was from an ordinary family. Rebecca Bradley, the director of the gardening club and student council president of the academy, reaches out to him, and Ray decides to join the club and take a test. At the same time, the academy was invaded by spies from the empire...

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.