SISTAR’s Hyorin has officially joined The Master’s Sun OST. You may have heard the song, as it was played at the end of the 4th episode of the show.

“Driving Me Crazy” was produced by Ahn Young Min, who has worked on numerous hit OSTs such as Tae Yeon’s “I Love You” (from Athena) as well as Davichi’s “Don’t You Know” (from Iris 2).

Listen to the song here, with subtitles: