BoA is gearing up to release new music in Japan, however she hasn't forgotten her Korean fans releasing a delicate OST for KBS' 'Shark' earlier today.

On May 27th, KBS revealed BoA's new OST, "Between Heaven and Hell", which is included in the drama's first OST album. The song is a soft ballad produced by Kim Hyung Seok and will be the drama's main theme song.

'Shark' is about a man who leaves the love of his life to exact revenge on those who have wronged him, starring Son Ye Jin and Kim Nam Gil. The drama premieres today on KBS.