Stephan has big ideas to save the sea. But his life explodes into ecstatic chaos when mermaid princess Chao proposes marriage out of the blue. Between shopping sprees, giant robots, and actual fireworks, the unlikely pair unlock their true feelings. Crafted over seven years by STUDIO4°C and veteran animator Yasuhiro Aoki, ChaO is a genre-defying delight bursting with color and character.?