July 10, 2061, Sunday. City: Nariyama. Prefecture: Chiba. Yamanashi Sora redevelops the radio while tinkering with some components. ‘…Just in time.’

That day marked the fifteenth year since the artificial pigeons started consuming electromagnetic waves.
Sora began broadcasting with the radio left to him by his father.

The next day, after his first rocky broadcast, a mysterious message is picked up by the radio.

“This is a follow-up report on the Firmament’s fall on August 1st. The death of a civilian named Yamanashi Sora has been confirmed at the former site of Terminal 1. A number of injured people has also been confirmed in Nariyama’s International Sky Academy.”

It’s a radio broadcast from the future.

“I’ll… die in three weeks…?”