Summary
In the 30th Century, the Earth has united as one country, and Kyoko is the princess of this country. She has a younger twin sister, Ui, who has been asleep ever since she was born. Around her sixteenth birthday, Kyoko has to reveal herself to her people as their princess. She objects to this because she had been living among the people as a commoner and she doesn't want to be the princess anyway, but trouble faces her school, and to save her friends, Kyoko has to step forward and reveal her identity.
(from mangaupdates.com)
