The Twin Blades of the changing world

The world of Lastasia was a very peaceful world, but one day the younger brother of the king led his forces and took control of the royal capital, killing the king, queen, the crown prince and the second prince and the first and second princess leaving only the third princess of the kingdom  Yuki alive who managed to escape thanks to the help of some members of the royal guard, What will happen to the princess? Will she be able to return to her home?