Yuki awakens in a Post-Restoration world and soon recovers her memory, only to learn that her lover perished in the World Restoration, led by Aiko.  Yuki sets forth to go back in time and kill the man who will be reincarnated as Aiko.  But she doesn't travel back in time alone.

Sins of the Sisters

Princess Diana runs away from an arranged marraige and straight into the arms of slave traders who capture her and she is forced to become a slave. She finds her long lost childhood friend/love there, who happens to be the sworn enemy of her families throne, and becomes his, but of course with the family wanting her back all is not ideal.