The story centers on Uki, an imperial concubine who has never been called to the emperor's bedchambers, and maintains a singularly unique life within the harem chambers. Seen by some as having the appearance of an old woman, and some others as a young lady, she is knowne to use mysterious magic that helps with everything from finding lost items to inflicting curses. When a circumstance makes the emperor call on her, their meeting will change history.
On August 16, midway through a seemingly endless summer vacation, middle school third-year student Nagara, the mysterious transfer student Nozomi, and classmates such as Mizuho and Asakaze, are suddenly transported from their tranquil daily lives to a school adrift in an alternate dimension. They must survive with the super powers that have awakened within them.