“Day by Day” is a simple ballad and the main song of the “Triangle” OST. The song was produced by Bum-E and Nang-E, the duo behind songs such as Huh Gak’s “I Told You I Wanted to Die” and “Monodrama.” The song will be used to describe the intensity of the love drama the main characters have. Ailee uses her powerful voice to sing about the loneliness and hurt that can come from a difficult love.
You can listen to the song here:
Ailee had previously sang another song for “Triangle,” “Do My Hair,” which was the first song released from the OST.