On October 19th, SISTAR's Hyorin released the OST track "Because You're My Only" for the KBS drama 'Man of Honor'. This release marks her first time releasing an OST (soundtrack) since her debut. "Because You're My Only" is the emotional theme song for the character Yoon Jae In in the drama.�Yoon Jae In is a struggling young woman who dreams of one day becoming a nurse. Reportedly, Hyorin cried after listening to the song, and worked very hard to bring all the sad emotions to life. Check out the track below and remember to support by purchasing the music. Source + Image: Nate