The anime's original story features Mutta and Hibito during one summer when they were children. During the summer when Mutta and Hibito made their promise to go to space, they met a young girl who also had a wish.
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As Team A searches for the mysterious alarm, Mutta notices some strange behaviour in Yasushi. Haven't been reminded about the cameras by Naoto, Mutta believes JAXA is behind these incidents. He recalls what he learnt whilst visiting Houston, in which green cards are given to astronauts in training instructing them to create problems. Thus, Mutta correctly deduces that both Naoto and Yasushi had been given green cards ordering them to break the clock and set off the alarm. Later, Serika confesses about the food shortage to Mutta, who mistakenly believes it to be another green card order.
Voice cast
Hibito Nanba
Mutta Nanba
Hikari
Same universe
Space Brothers
manga
tv