SEE ALSO: Go Hyun Jung reflects on deep longing for her son after divorce

"It's cold" is one of two title songs from Shin Hyun Bo's new album. This song started off with Shim's desire to write a song that carries the "cold" and chilling emotions of a break-up. Once the lyrics and the arrangement were ready, Shim thought a lot about which vocalist's tone will best fit the ambiance of the song. Shim is said to have been looking for a voice that was different, perhaps a more "fragile" voice that belongs to a younger man. So Shim decided to have someone feature for the song, which turned out to be 2AM's Seulong. 

Seoulong accepted the invitation and takes the song to even greater heights with his vocal expertise. Seulong does an excellent job at bringing out the cold, indifferent mood of the song much to the delight of fans.

What do you think of this collaboration?