The Barsburg Empire's Military Academy is renowned for training elite soldiers who secure victories for the empire. Academy students freely employ a power known as “Zaiphon” in combat, with the specific type of Zaiphon available to each soldier depending on their nature. Teito Klein, one of the academy’s most promising trainees, is ridiculed for being a “sklave”, a German term for slave, and for having no memories of his past. Nevertheless, he forms a friendship with fellow student Mikage. As they prepare for the final exam, Teito discovers a dark secret tied to his own history. When an assassination attempt on Ayanami, a high‑ranking official responsible for his father's death, fails, Teito is imprisoned in anticipation of punishment. Only wan…