Paros no Ken

A legend in the kingdom of Paros speaks of a powerful sword that could bring ruin if wielded by an unworthy ruler. As the only heir to the throne, Princess Erminia is required to accept both the sword and a husband upon reaching adulthood. She refuses to marry anyone she considers less of a man, which leaves no suitable candidates in the kingdom. When the king commands her to marry her foster brother Yurias, she meets Fiona, a striking and unfortunate young woman, changing the course of events.