Gill (2026): Cast, Story and Release Details

Prepared by Movies Dock Editorial

Gill is a South Korean animated fantasy drama about Gon, a boy who survives after growing gills, and the unusual family that helps him face life beyond isolation. Directed by Ahn Jae-huun, the 2026 film explores rescue, protection and the difficult pull between shelter and the wider world.

Gill is a 2026 South Korean animated fantasy drama centered on Gon, a boy whose body changes in a life-saving way after he is nearly lost to death. The film places that fantastical premise inside a story about family, dependence and the challenge of entering the world beyond a protected home.

Directed by Ahn Jae-huun, Gill features voice performances from Jung Hae-in, Kang Ha-neul, Lee Chung-ah and Yoo Jae-myung. Its 1-hour, 46-minute running time gives the film room to follow the unusual bond formed between Gon, Kang-ha and Kang-ha’s grandfather.

Gill movie details

Story without spoilers

Gon is close to death when gills grow on his body, allowing him to breathe again. Kang-ha and his grandfather rescue him, and the three gradually form an unconventional family. As they grow older, Kang-ha becomes hostile toward Gon, who has withdrawn from the outside world. Yet Kang-ha ultimately sends Gon out into that wider world to protect him.

The title also connects to Gon’s name, which is shared with a fantasy bird said to travel thousands of miles in a day. That idea adds a symbolic dimension to a story about a boy whose life is shaped by water, isolation and the possibility of movement beyond familiar surroundings.

What to expect

Gill combines animation, drama and fantasy rather than presenting its premise as a straightforward realistic story. The central fantasy element is Gon’s ability to breathe after developing gills, while the emotional focus rests on the peculiar family that forms around him.

The synopsis points to a relationship marked by both attachment and conflict, particularly as Kang-ha struggles with Gon’s separation from the world. Viewers can expect a character-driven story about rescue, protection and the tension between keeping someone safe and allowing them to face life independently. No specific visual approach or ending is provided in the supplied details.

Cast and creative team

Ahn Jae-huun directs Gill and shares writing credits with Seo Hae-in and Kim Joo-an. Jung Hae-in voices Gon, while Kang Ha-neul voices Kang-ha. Lee Chung-ah voices Hae-ryu, Yoo Jae-myung voices the Old Man, and Kim Sun-young voices I-nyeong. The additional cast includes Jang Won-young, Kwon Hae-hyo, Cho Han-chul, Jung Woong-in and Hwang Sang-kyung.

• Jung Hae-in as Gon (voice)
• Kang Ha-neul as Kang-ha (voice)
• Lee Chung-ah as Hae-ryu (voice)
• Yoo Jae-myung as Old Man (voice)
• Kim Sun-young as I-nyeong (voice)
• Jang Won-young
• Kwon Hae-hyo
• Cho Han-chul
• Jung Woong-in
• Hwang Sang-kyung

Release and production context

Gill is listed as released on September 9, 2026, with a runtime of 1 hour and 46 minutes. The film is from South Korea and is spoken in Korean. Its production companies are Meditation With a Pencil and Namu Animation. The movie’s original Korean title is 아가미.

Production companies: Meditation With a Pencil, Namu Animation

Gill official trailer

Watch the official trailer on YouTube

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Gill brings a fantastical physical transformation together with an intimate family story. Its premise gives Gon an unusual connection to water, while the relationship between Gon and Kang-ha supplies the film’s central emotional tension. For viewers seeking an animated drama with fantasy elements and a Korean setting, the available details present a focused story about survival, separation and protection.

Film data:
TMDB · IMDb