Where in your world do I belong in?

Princesses are the models of pure, dainty, respectful, bold, basically everything that Yusa Kakumei doesn't have. In fact, she's the total opposite of it. She knows how to fight using a katana, speaks discourteously, and stubborn. Everything came to an end for her, when her dad signs a alliance contract with their long-hated enemy to end all the wars they had. She was forced to become the bait of this. How is she going to escape this mess created by her father? What is the reason of her being chosen to be the one out of her five sisters? As she realized what's going on, everything in the past can't be undone.