Veteran singer JK Kim Dong Wook is the voice behind the theme song for OCN crime drama 'Tunnel'.
Titled "Circle of Life", the song illustrates the longing to turn back time to where you used to be. Though JK Kim Dong Wook is known for jazz, blues, and soul, he presents an alternative style for the track, which has a moody, mysterious tone.
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Watch the music video for "Circle of Life" featuring footage from the suspenseful series above!