In a near-future world where humans and mermen coexist, Stephen, a shipping engineer in Shanghai, develops a propeller called Air Jet that is harmless for marine life to promote peace between the two races. When ChaO, a mermaid princess, pushes Stephen to marry her, their two worlds collide. As they struggle with their cultural differences, a tragic accident creates a bigger strain on their relationship.
Unfortunately the movie ChaO is not yet available on HBO Max.
| Directing | Yasuhiro Aoki | Director |
| Visual Effects | Hirokazu Kojima | Character Designer |
| Art | Hiroshi Takiguchi | Art Direction |
| Visual Effects | Hirokazu Kojima | Supervising Animation Director |
| Sound | Takatsugu Muramatsu | Original Music Composer |
| Production | Eiko Tanaka | Producer |
| Sound | Koji Kasamatsu | Sound Director |
