Kijoku: Princess Double Kari

Distol, the prince of Asteria, endured eight years of humiliation as a hostage in the neighboring kingdom of Bartrage. His mother, sent there with him, died during that time. After returning home, he devoted himself to fencing and learning, determined to protect what matters to him. But his resolve is tested when he learns that his beloved sister-in-law has been chosen as the "Holy Lady"—a role that requires her to sacrifice her life to seal Satan.

Feeling powerless to save her, Distol is approached by a mysterious woman in black who claims to be a witch. She offers him powerful magic in exchange for two tasks: infiltrate Bartrage to steal its royal family's secret treasure, and kidnap Princess Irina. Bound by the pact, Distol must navigate political intrigue and dark forces to rescue his sister.