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.

• DirectorYasuhiro Aoki
• Release15 August 2025
• Genre
  Animation / Fantasy
• Duration0h
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• Productions

  STUDIO4℃