The best sad backstories end with heartwarming triumphs.
So what's next? Judith and Luca are closer than ever. Luca is not a Winterwald, but he is a royal descendant. Judith and Ruedigger are in love, but the crusty King Emiritus just won't have it (Thanks, Jonass).
I guess we need to have a drama arc where Luca finds his new place without House Winterwald, and Judith needs to get her Marriage to Ruedigger approved. Possibly those two goals end up working together? As others pointed out, Marrying Jud/Rued makes Luca an unofficial Winterwald again. And proving that Jonas was never a Winterwald could get the king to redirect his anger.