In a tranquil neighbourhood of Tokyo, seven teenagers wake to find their bedroom mirrors are shining. At a single touch, they are pulled from their lonely lives to a wondrous castle filled with winding stairways, watchful portraits and twinkling chandeliers. In this new sanctuary, they are confronted with a set of clues leading to a hidden room where one of them will be granted a wish. But there's a catch: if they don't leave the castle by five o'clock, they will be punished. As time passes, a devastating truth emerges: only those brave enough to share their stories will be saved.
Satomi is fine being alone until an AI named Shion joins her class with a song and a promise to make her happy. While Shion’s musical numbers and princess gowns don’t quite pass as human, her antics bring Satomi closer to four other classmates. Together, they make memories worth saving, but even our most precious data can be erased.
With dreams of diving abroad, Tsuneo gets a job assisting Josee, an artist whose imagination takes her far beyond her wheelchair. But when the tide turns against them, they push each other to places they never thought possible, and inspire a love fit for a storybook.
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.