My Lord, Wolf Queen

Kang Jun is a prince from a small eastern kingdom that was conquered by the West. Captured as a hostage, he is brought to the castle of Rosaline, the powerful and sovereign queen of the victorious nation. As a war prize, he is given to her and kept under her control. Eventually, he uncovers a hidden political truth about Rosaline. Rather than remaining silent, he uses this knowledge to manipulate her authority in an effort to restore his homeland.