Jenseits des Regenbogens 2001 on netflix

To the dismay of his tradition-conscious father, the young Count Carl von Wildberg-Reutlingen has become engaged to a commoner. When his older brother Alexander dies in a hunting accident, Carl finds himself in the role of heir to the house. In order to prevent the family estate from falling to the state, Carl has to sacrifice his great love, as he must now continue the family line by marrying a noblewoman.