The World Before (2026): Cast, Story and Release Details

Prepared by Movies Dock Editorial

The World Before is a South Korean drama-romance centered on Jin, a teenage girl entering puberty and experiencing her first love with her best friend, Dujae. Set on a small island, the film explores a formative relationship through an intimate coming-of-age premise, with Sim Su-bin and Kim Eo-jin in the lead roles.

The World Before is a 2026 South Korean drama-romance written and directed by Yoon Dan-bi. The film follows Jin, a teenage girl navigating puberty as she begins a first love affair with her best friend, Dujae.

Set on a small island, the movie focuses on a youthful relationship at a formative stage of life. Sim Su-bin plays Jin, while Kim Eo-jin appears as Park Dujae.

The World Before movie details

Story without spoilers

Jin is a high school-aged girl going through the changes of puberty on a small island. Her friendship with Dujae, played by Kim Eo-jin, begins to develop into a first love affair, placing their relationship at the center of the story.

The premise suggests an intimate coming-of-age drama shaped by the setting and by the uncertainty of a first romantic experience. The supplied synopsis does not reveal how the relationship develops or where it leads.

What to expect

The World Before is identified as both a drama and a romance, with a focus on adolescence, friendship and first love. Its island setting provides the backdrop for Jin’s personal experience, while the story’s central relationship remains between Jin and her best friend Dujae.

Viewers can expect a character-focused premise rather than a plot built around large-scale action. The film’s 1-hour, 55-minute runtime gives room for its central coming-of-age relationship to remain the main point of attention, although specific stylistic or tonal details are not provided.

Cast and creative team

Sim Su-bin stars as Jin, the teenage protagonist at the center of the story. Kim Eo-jin plays Park Dujae, Jin’s best friend and romantic counterpart.

Yoon Dan-bi serves as both director and writer. The credited production companies are Onu Film and First Step.

• Sim Su-bin as Jin
• Kim Eo-jin as Park Dujae

Release and production context

The World Before is a 2026 film from South Korea, with a listed release date of September 16, 2026. It has a runtime of 1 hour and 55 minutes. The listed spoken languages are Korean and Urdu. The film is classified as a drama and romance, and its original Korean title is 첫세계.

Production companies: Onu Film, First Step

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With its small-island setting and focus on a teenage girl’s first love, The World Before presents a contained coming-of-age story built around Jin and Dujae’s changing relationship. Its appeal will likely depend on how viewers respond to this intimate premise and the characters’ transition from friendship toward romance.

Film data:
TMDB