ChaO

About ChaO

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.

ChaO is a 2025 animation fantasy film directed by Yasuhiro Aoki. Ouji Suzuka takes the lead as Stephan (voice), Anna Yamada as Chao (voice), Kavka Shishido as Maibei (voice), and Yuuichirou Umehara as Roberta (voice).

Released in August 2025, it runs 90 minutes. Written by Saku Konohana.

Shelv files it under princess, marriage proposal, mermaid, and love story. It carries a NR rating.

Ponyo, The Princess and the Pilot, and Your Name. make useful companions to ChaO.