The Sea Captain's Bride

After possessing the eldest daughter of Count Leire, Archel became the head of the family following her parent's death. The only way to protect her little brother and herself from the old foxes who are after her family was...

"I know that you need Leire's sea territory." In order to acquire a shield called Gael Von Zenat, the infamous guardian of the eastern sea, but in reality, he was the head of a pirate family. "I'll give you the sea territory there. So, marry me." It wasn't a romantic proposal. It was just a perfect deal. You take care of our family's sea, and I'll protect myself and my brother.

I thought so, but...am I mistaken?

(Source: Kakao Entertainment Corp., translated)