Lovelyz's Kei dedicated her voice for an emotional OST to currently airing SBS Wed-Thurs drama 'The Last Empress', titled "If I Send My Heart" (literal translation). 

'The Last Empress' tells the story of a modern, fictional Korean society where a royal family still exists. One musical actress (played by Jang Na Ra) suddenly becomes betrothed to the young and handsome modern emperor (played by Shin Sung Rok), facing internal struggles against the emperor's mother and her almighty authority. 

Kei's delicate OST Part. 3 "If I Send My Heart" combines rich string instrument sounds with a traditional ballad melody, accentuating the emotional developments of the story. Catch highlights from 'The Last Empress' so far above in Kei's "If I Send My Heart" OST MV. 

Meanwhile, 'The Last Empress' airs every Wed-Thurs at 10 PM KST.