Roy Kim is the voice behind "Whenever, Wherever" for the 'My Demon' OST.

The music video above features emotional scenes between CEO Do Do Hee (played by Kim Yoo Jung) and 200-year-old demon Jung Gu Won (Song Kang) as well as Do Do Hee and her adopted mother Joo Cheon Sook (Kim Hae Sook). "Whenever, Wherever" is a sweet ballad about wanting to be by someone no matter where they are.

Watch Roy Kim's "Whenever, Wherever" MV above, and let us know what you think in the comments below.