In ancient times, the land of Kyushu was inhabited by the Yu clan who could fly, the human clan who were good at practicing secret arts, and the Mei clan who always hid in the darkness. The Yu tribe is divided into gold-winged feathered people, silver-winged feathered people and black-winged feathered people. The golden-winged feathered people advocate peace, and the silver-winged feathered people live in unknown places where they can move all year round. Although they are good at mechanism skills, they never care about worldly affairs. The black-winged feathered people are ambitious and always want to unify Kyushu, and constantly launch attacks on various towns and fortresses on the land of Kyushu. Finally, they were annihilated by the Golden Wing Feather Clan and the human race on the land of Kyushu a hundred years ago. The fleeing Black Wing Feather Tribe cut off the wings that could fly into space with their own hands, mixed them up with the Mei Tribe, and lived in the darkness that never saw the light of day, waiting for the birth of the legendary Crystal Queen. 'Whoever gets the Crystal Wings will conquer the world.'
Motto: Sunshine always comes after the storm