BOYNEXTDOOR’s Sungho to Release First Solo OST for the Korean Launch of ‘5 Centimeters per Second’

The K-pop industry is buzzing with excitement as Sungho, a prominent member of the rising boy group BOYNEXTDOOR, prepares to reach a significant milestone in his career.

On February 20, 2026, it was officially announced that Sungho will be lending his emotive vocals to the official soundtrack (OST) of the Korean release of the live-action adaptation of the iconic film 5 Centimeters per Second.

This project marks Sungho’s very first solo OST since his debut, showcasing his growth as a vocalist and his ability to carry a sentimental narrative through song.

A Modern Take on a Timeless Masterpiece

5 Centimeters per Second, originally an acclaimed animation film by the legendary director Makoto Shinkai, is a poignant exploration of long-distance love, the passage of time, and the emotional distance that can grow between two people.

The live-action adaptation, which aims to bring this delicate story to life with real-life actors, was first released in Japan in October 2025.

Following its success in its home country, the film is scheduled to hit theaters across South Korea on February 25, 2026.

To enhance the emotional depth of the film for Korean audiences, the production team sought a voice that could capture the “gentle and sentimental mood” required for such a bittersweet story.

Sungho was selected for this task, and he will be performing a Korean remake of the classic track “One More Time, One More Chance.”

Originally sung by Yamazaki Masayoshi, the song is deeply intertwined with the identity of 5 Centimeters per Second, often cited as one of the most heartbreaking and beautiful theme songs in cinema history.

Sungho’s Artistic Expression and the “Remake” Challenge

Sungho’s rendition of “One More Time, One More Chance” is highly anticipated by both “ONEDOOR” (the group’s fandom) and fans of the original film.

According to industry reports, the remake will focus on recreating the song’s melancholic atmosphere while incorporating Sungho’s unique “careful expression technique.”

Known for his stable yet emotionally resonant voice within BOYNEXTDOOR, Sungho is expected to deliver a performance that respects the original’s legacy while providing a fresh, modern perspective for a new generation of listeners.

This solo venture is a departure from the high-energy, performance-heavy tracks typically associated with BOYNEXTDOOR.

It allows Sungho to demonstrate his versatility as an artist, proving that he can hold his own on a track that relies heavily on vocal control and raw emotion.

For many fans, this OST serves as a “vocal showcase” that highlights the individual strengths of the group’s members as they continue to expand their creative horizons.

Release Date and What to Expect

The official Korean release of “One More Time, One More Chance” by Sungho is set for February 25, 2026, at 6 PM KST, coinciding with the film’s premiere in Korean theaters.

The timing of the release is strategically planned to maximize the emotional impact on moviegoers as they experience the film’s themes of longing and memory.

As BOYNEXTDOOR continues to build their international presence- most recently making headlines with their creative “Buldak Hotter Than My EX Ver.” music video- Sungho’s solo OST signals a diversifying portfolio for the group under KOZ Entertainment.

By participating in the soundtrack of a globally recognized intellectual property like 5 Centimeters per Second, Sungho is not only solidifying his status as a talented vocalist in Korea but also reaching out to a global audience of cinephiles and music lovers.

Fans are encouraged to tune in on February 25 to witness this heartfelt tribute to love and time.