Overview
- The Studio 4°C feature began U.S. screenings through GKIDS on Friday, April 10, 2026, drawing a wave of English‑language reviews that praise its look but split on the script.
- The near‑future tale follows mermaid princess ChaO and ship engineer Stephan in a strategic marriage meant to ease human–merfolk tensions and advance a safer shipping plan.
- A central thread involves an air‑jet propulsion project designed to replace ship propellers to reduce harm to sea life, which gives the romance geopolitical and environmental stakes.
- Critics single out the bold, hand‑drawn style, kinetic linework, and densely detailed backgrounds, noting a seven‑year production that shows in the lived‑in world on screen.
- Many reviews fault the pacing and character work, citing abrupt tone shifts that mix paparazzi antics and an out‑of‑nowhere mech sequence, leaving the central romance feeling thin.