Planetarium Uchuu Kyoudai: Itten no Hikari
Ano: 2012
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. (Source: Anime News Network)
Gêneros: Comedy, Sci-Fi, Slice of Life, Seinen