One day, Kaito Shirahase, a male idol who belongs to a popular group, gets into a traffic accident while driving to a dome where they will perform.

Meanwhile, the scene changes to a medieval fantasy-like world. Her heroine, ``Coco-Nina,'' heads to the temple's cathedral for her coming-of-age ceremony.

She is ecstatic as she receives the blessings of the goddesses who protect this world.

However, strange memories flood into her mind.

"This...I know this memory...I--I'm Kaito Shiranase!"