On October 1, the OST production company of tvN's upcoming series 'Jirisan' stated, "The OST that Jin sang for 'Jirisan' is one of the series' main theme songs, and viewers can listen to it toward the middle of the series. We will announce the track's official release date at a later time."
Meanwhile, 'Jirisan' is a highly-anticipated blockbuster series coming to tvN later this month, starring Jun Ji Hyun and Joo Ji Hoon. The story centers around national park rangers who stumble across a dark secret hidden within the mountain. It's slated to premiere on October 23 at 9 PM KST.