Hyorin sings 'Windup Watch' for 'Black Knight' OST!

Hyorin is the voice behind the first track from the 'Black Knight' OST, "Windup Watch"!



The music video includes romantic moments between Shin Se Kyung and Kim Rae Won's characters, Jung Hae Ra/Boon Yi and Moon Soo Ho, from the KBS drama about a man who accepts a dangerous fate to protect the woman he loves. "Windup Watch" is a playful ballad composed by SM Entertainment's Kenzie and Lee Na Il. 

Check out Hyorin's "Windup Watch" above, and let us know what you think in the comments below!