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.
About the film
Plays from YouTube when you press play; nothing loads from them until then.
Fi1m review
Coming soon. Our review of ChaO will be published shortly before it opens in the UK on 4 December 2026, once the press has seen it and there is something to weigh it against.
Cast
Ōji Suzuka
Stephan (voice)
Anna Yamada
Chao (voice)
Kavka Shishido
Maibei (voice)
Yūichirō 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)
9cast+ 71 crew
Full cast & crew
Everyone credited
Awards
Annecy Cristal for a Feature Film, 2025
Nominated
Annecy Cristal for a Feature Film
