ChaO
He's on the hook.
In a futuristic world where humans and mermaids coexist, the life of mild-mannered office worker Stephan is upended when he is suddenly proposed to by Chao — a princess from the mermaid kingdom.With no time to make sense of what's happening, Stephan soon finds himself living with the unpredictable, wholehearted Chao, and her sincere love begins to break down his emotional barriers.
Who's in it
Cast
The billed ensemble, with character names. Open any performer for their Nutevio filmography.
9 billed performers
Story overview
What It's About
Spoiler-free. Read the analysis below for the full argument.
In a futuristic world where humans and mermaids coexist, the life of mild-mannered office worker Stephan is upended when he is suddenly proposed to by Chao — a princess from the mermaid kingdom. With no time to make sense of what's happening, Stephan soon finds himself living with the unpredictable, wholehearted Chao, and her sincere love begins to break down his emotional barriers.
Where to watch
Streaming
Availability verified against regional listings.
Checking regional listings…
The numbers
Box Office & Release
- Budget
- —
- Opening weekend
- —
- Domestic gross
- —
- International gross
- —
- Worldwide gross
- —
- Release date
- Aug 15, 2025
- Runtime
- 1h 30m
- MPAA rating
- NR
- Language
- Japanese
- Country
- Japan
Figures from the verified production record. Fields we cannot source are left blank rather than estimated.
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