The Emperor and the Slave

This novel is about a girl who lives in poverty but had a happy life with lovely parents. Nothing last long. And so this ended when robbers attacked her hometown and her family was starving. The brave Yui made a decision. She sold herself as a slave in order to protect her family. Before she left, she promised to come back to her parents no matter at what cost. With this strong will, she started her long journey. Will she survive and meet allies on her journey?