Singer and actress Suzy lends her voice to the Transit Love 4 soundtrack with a heartfelt ballad.

On October 29 at 6 PM KST, Suzy will release One Day, the new OST for TVING's hit reality show Transit Love 4. The song reflects on a love that has passed, capturing the quiet ache of remembering someone who once meant everything.

Known for her calm yet crystal-clear vocals, Suzy brings emotional depth to the track. One Day will accompany key scenes in which the show's cast revisits their past relationships and moments of longing, adding warmth and poignancy to the narrative.

Transit Love 4 follows ex-couples living together as they confront memories of their past and explore the possibility of new beginnings. The latest episode will be released on October 29 at 8 PM KST.