Lonely and awkward, Giovanni struggles with his sick mother, absent father, and an afterschool job that isolates him from his peers. But on the night of the Festival of Stars, he is magically transported onto a celestial train with his only friend, Campanella. Together, they embark on an extraordinary journey through the galaxy, encountering mysterious characters and grappling with life's deepest questions.
| Actor | Role |
|---|---|
 Mayumi TanakaGiovanni (voice) | Giovanni (voice) |
 Chika SakamotoCampanella (voice) | Campanella (voice) |
 Junko HoriZanelli (voice) | Zanelli (voice) |
| KKaori NakaharaKaoru (voice) | Kaoru (voice) |
 Yoshie ShimamuraGiovanni's Mother (voice) | Giovanni's Mother (voice) |
| RReiko NiimuraOld Woman (voice) | Old Woman (voice) |
| AAyumi Ishijo(voice) | (voice) |
| AAyako Hori(voice) | (voice) |
 Chikao OhtsukaBirdcatcher (voice) | Birdcatcher (voice) |
| HHidehiro KikuchiYoung Man (voice) | Young Man (voice) |
 Yuriko FuchizakiTadashi (voice) | Tadashi (voice) |
| SShun Yashiro(voice) | (voice) |
 Fujio TokitaLighthouse Keeper (voice) | Lighthouse Keeper (voice) |
 Gorō NayaCampanella's Father (voice) | Campanella's Father (voice) |
 Miyuki IchijouMarceau (voice) | Marceau (voice) |
 Ryuji SaikachiStore Owner (voice) | Store Owner (voice) |
 Takeshi AonoWireless Operator (voice) | Wireless Operator (voice) |
 Tetsuya KajiConductor (voice) | Conductor (voice) |