Seo In-guk Joins 'See You at Work Tomorrow!' OST With Acoustic Ballad

Singer-actor Seo In-guk is stepping behind the mic for the drama he currently headlines. The fourth OST from tvN's Monday-Tuesday series "See You at Work Tomorrow!" (Naeildo Chulgeun!), titled "The One Who Filled Me" (Nal Chaewojun Han Saram), drops at 6 p.m. KST on major music platforms.

The track is built on a warm acoustic folk sound. Seo In-guk performs the song himself, drawing on the emotions of his character, Kang Si-woo, to deepen the connection between the music and the story. His restrained vocals are meant to pull viewers further into the drama.

"See You at Work Tomorrow!" follows Cha Ji-yoon (played by Park Ji-hyun), a seven-year office worker stuck in a daily rut, and her prickly boss Kang Si-woo (Seo In-guk), as the two slowly become each other's irreplaceable best option. It is an office romance built on the small frictions of coworker life.

The series has held viewership in the 4 percent range for two straight weeks. Its fourth episode, which aired on the 30th, drew a 4.5 percent rating. In the same time slot, ENA's "Doctor on the Edge" (Dakteo Seomboi), starring actor Lee Jae-wook, posted 4.8 percent.

"The One Who Filled Me" arrives at 6 p.m. KST across streaming and download services.