Anna Weiss, the daughter of a Duke of the Caro Empire, escaped while being transported into exile after killing her guards; her father had been executed by the Emperor for treason, and her mother imprisoned. She cut her long hair, disguised herself as a man under the alias "Aaron," and infiltrated a warrior training camp on the empire's frontier, determined to master military skills and avenge her family. Arthur, a non-commissioned officer at the camp, is the Emperor's younger brother; he was ordered to hunt Anna down and holds a secret mandate to execute her on sight. However, after discovering her true identity, he repeatedly shielded her and refrained from reporting her presence. Thus, a complex dynamic of surveillance and protection developed between the two—an avenger living under an assumed name and the royal tasked with hunting her down. Meanwhile, the imperial manhunt for Anna intensified, while remnants of the Weiss family's loyalists remained in hiding along the border, awaiting her return.
