Shrunken down to nanoscale, a professor and a scrappy kid end up inside a human body, where they must rely on their wits and knowledge to survive!
| Actor | Role |
|---|---|
 Akira IshidaKei (voice) | Kei (voice) |
 Megumi HanPipi (voice) | Pipi (voice) |
 Satsumi MatsudaGeo (voice) | Geo (voice) |
 Hiroshi IwasakiDr. Brain (voice) | Dr. Brain (voice) |
 Hiroki TouchiNarrator (voice) | Narrator (voice) |