Since they were young, Akira has had the ability to see the future, while his cousin Hotaru has had the ability to see the past. They’ve had some terrifying experiences because of their special abilities, but they’ve been able to overcome them with each other by their side. One day, Akira saw a “future” in which Hotaru’d kiss him, and became so confused that he ran away from him. Ten years later, Hotaru suddenly appeared in front of Akira, floating in the air. Hotaru said, “I’m not dead yet” and wanted Akira to come save him right away, but…?