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.

Cast

Hiroaki Hirata

Mutta Nanba (voice)

KENN

Hibito Nanba (voice)

Masayuki Katou

Kenji Makabe (voice)

Miyuki Sawashiro

Serika Itou / Mutta Nanba as a Boy (voice)

Masako Ikeda

Sharon Kaneko (voice)

Yuko Sanpei

Hibito Nanba as a Boy (voice)

Shô Ryûzanji

Tadashi Hoshika (voice)

Ryou Naitou

Yasushi Furuya (voice)

Shintaro Asanuma

Yamato Mizoguchi (voice)

Takanori Hoshino

Reiji Nitta (voice)

Seasons

99 episodes

Season 12012 · 51 episodes

Season 22013 · 48 episodes