The Dragon Knight's Beloved (Manga) Vol. 2 (manga)

MISTRESS TO THE MARGRAVE

After stepping down as the commander of the Dragon Knights, Hubert asked Melissa to accompany him to his estate and pretend to be his lover. There they found a hostile greeting at the hands of Eleanor, a woman who was fiancee to Hubert's late brother. Eleanor hoped to see that engagement transferred to Hubert, but he steadfastly refused, declaring that he would only marry Melissa, a woman who has the approval of his dragon.

Seeing no way to immediately change Hubert's mind, Eleanor decided to leave the estate. But chances are good that she hasn't surrendered, and is preparing the first moves in a sinister plot to obtain what she desires!