Lovelyz's vocalist Kei sang a beautiful OST for currently airing MBC drama, 'Monarch - Owner of the Mask'!
SEE ALSO: Lovelyz' Kei drops 'Star and Sun' MV teaser for 'Monarch - Owner of the Mask' OST
Her OST Part 4 is titled "Star and Sun", a song about lovers who are unable to meet, like the stars and the sun. Sounds like the perfect metaphor to describe the tangled relationships between the characters in 'Monarch - Owner of the Mask'!
Listen and fall for Kei's voice above!