Chuya Koyama

When they were young, the brothers Mutta and Hibito promised each other they would become astronauts. Now, in 2025, Hibito has followed his dream to become the first Japanese on the moon, but Mutta has just been fired from his job. His brother reminds him of their childhood promise, and Mutta decides once again to aim for space.

Prequel to the TV anime series, revolving around the "origin of the dream."

When Mutta was 12-years-old and Hibito was 9-years-old the two brothers saw what they thought was an UFO flying towards the moon. They made a pact then to become astronauts and one day fly into space together. Fast forward to the year 2025. Older brother Mutta (Shun Oguri) works as for an automotive company and his younger brother Hibito works as an astronaut. Although Mutta failed to follow through on his childhood promise, after losing his job, he receives a phone call from Hibito which reignites his childhood dream of flying into outer space ...