Boo Kwai, a very naughty boy, accidentally arrives in a parallel universe thanks to one of his inventions.
| Actor | Role |
|---|---|
 Yang NingKwai Boo (voice) | Kwai Boo (voice) |
 Li LanlingQin (voice) | Qin (voice) |
| XXin ShanSpring (voice) | Spring (voice) |
 Tong XinzhuPeach (voice) | Peach (voice) |
| TTong YinKwai Peel (voice) | Kwai Peel (voice) |
 Meme YanGigi (voice) | Gigi (voice) |
| ZZhifu LiuMs. Lu (voice) | Ms. Lu (voice) |
| TTut HarmonDog (voice) | Dog (voice) |
| WWentao ChangMan (voice) | Man (voice) |
 Li HanlinMark (voice) | Mark (voice) |