A young girl, from a civilization that resides in deep underground tunnels, finds herself trapped in an inverted world and teams up with a resident to escape and return home.
| Actor | Role |
|---|---|
 Yukiyo FujiiPatema (voice) | Patema (voice) |
 Nobuhiko OkamotoAge (voice) | Age (voice) |
 Takaya HashiIzamura (voice) | Izamura (voice) |
 Shintaro OhataPorta (voice) | Porta (voice) |
 Shinya FukumatsuElder (voice) | Elder (voice) |
 Masayuki KatouLagos (voice) | Lagos (voice) |
 Hiroki YasumotoJack (voice) | Jack (voice) |
 Maaya UchidaKaho (voice) | Kaho (voice) |
 Hideyuki UmezuPrincipal (voice) | Principal (voice) |
 Go ShinomiyaTeacher (voice) | Teacher (voice) |
 Yu ShimamuraAnnouncement (voice) | Announcement (voice) |
 Tomoyuki ShimuraUnderground Person A (voice) | Underground Person A (voice) |
| SShunsuke ItouUnderground Person B (voice) | Underground Person B (voice) |
 Yuka KeichoUnderground Person C (voice) | Underground Person C (voice) |
 Genki MuroStudent (voice) | Student (voice) |
 Toru SakuraiResearcher A (voice) | Researcher A (voice) |
 Kiyohito YoshikaiResearcher B (voice) | Researcher B (voice) |