On the first day of the new school period, Akana Motomiya's high school period, her classmate of Morimur Tenma and her friend of the younger class Shimon is on the mysterious old well. When they wake up, they are in Ke, another world, which looks like Kyoto during the Hayan period. According to the young Sibling of the Star Clan Fujihimhe, the Akana-Priestess Ryudzin But Miko of the Dragon God, which came to save Ke from the Clan's ambitions they are in this task, Akana helps eight people known as Hastie, and his friends of Tenma and Shimon are considered among them. Originally, Akana is puzzled by its new circumstances, but gradually faces his own destiny and understands the world of Ke.