The Romeo to my Julio?

Prince Feliciano of Italy has his life planned for him. To be married and becoming king of Italy or whatever land his suitor is from. But after a ball where he meets the mysterious Prince Ludwig of Germany he's quite confused. He knows that it's for the best for his kingdom to marry into a allied countries royalty but he can't shake these feelings for Prince Ludwig. They realize that they are in love but Prince Feliciano's brother, Prince Lovino, strongly disapproves of their relationship. He forbids Feliciano from seeing him on the threat that he will kill him if he sees him. Ludwig tries to ignore his feelings but he can't deny that he loves him. What will happen to their young relationship? Will it be severed before it's started or will it blossom and become a beautiful thing?