Prince Freya, Vol. 6: Volume 6 (manga)

To save her kingdom, a simple village girl must live a royal lie. The powerful kingdom of Sigurd has slowly been conquering all the lands that share its borders, and now it has turned its voracious attention to the small, resource-rich Tyr. Tyr cannot hope to match Sigurd in strength, so in order to survive, it must rely on the intelligence, skill and cunning of its prince and his loyal knights.

But should their prince fall, so too shall Tyr... Freya and her loyal knights are anxious to reforge bonds of political friendship with the Nachtian court, but their diplomatic mission is jeopardized when she and Julius are abducted by ruffians! Thrown into a dungeon to languish, they soon learn that in order to save themselves and Tyr, they must first save the heart of Nacht.