You are a prince of well known royal family. Your Heritage is known for being violent and conquering other kingdoms. However, there has always been one kingdom in particular that is as powerful as your kingdom. Your father decides one day that its better to be allies with the kingdom. So he forces you to be a princess to marry their prince. And you manage to pull the role of a women so well that even after months pass, the prince still has no idea that he married a prince.