Yoake Mae yori Ruriiro na centers on Princess Feena Fam Earthlight from the Kingdom of Sphere on Earth's moon. It was decided that she was to live on Earth in a homestay with the family of the primary secretary to the president of the United Nations so as to get more knowledgeable of Earth in order to better prepare herself for her succession as the Kingdom of Sphere's next queen.

(Source: Wikipedia)