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.
Starring
Ouji Suzuka, Anna Yamada, Kavka Shishido
Updated Feb 16, 2026
WHERE TO WATCH
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Year context
ChaO was released 1 year ago in 2025.
Overview
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 —...
ChaO is a Animation, Fantasy, Romance film with a runtime of 1h 30m.
CAST (9)
Ouji Suzuka
Stephan (voice)
Anna Yamada
Chao (voice)
Kavka Shishido
Maibei (voice)
Yuuichirou Umehara
Roberta (voice)
Kenta Miyake
King Neptunus (voice)
Shunsei Ōta
Juno (voice)
Anna Tsuchiya
Editor-in-Chief (voice)
Kunihiro Kawashima
Ambassador Omede / Photographer / Shop Owner (voice)
Ryota Yamasato
President Shi (voice)
DETAILS
FREQUENTLY ASKED QUESTIONS
What is ChaO about?
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.
How long is ChaO?
ChaO has a runtime of 90 minutes (1h 30m).
Who stars in ChaO?
The cast of ChaO includes Ouji Suzuka, Anna Yamada, Kavka Shishido, Yuuichirou Umehara, Kenta Miyake.
What is the rating of ChaO?
ChaO has a rating of 8.0 out of 10 based on 2 votes on TMDB.
GENRES (3)
Animation
Fantasy
Romance