The script won the 2006 TV Asahi contest for new scenario writers. The story is about the secret game between two childhood friends. In that game, Kurokawa is a princess and her friend Mizushima is her servant. They promised to keep on playing the game until someone finds about it.

Toshiko, a high school student, receives a text message and picture from her brother, whom she has not seen in years. The image foretells the death of a woman a day later. This is only the first of many haunting images that appear throughout the film.