Singer Huh Gak's digital single "Day N Night" was released on October 7.

On September 30, the image teaser unveiled by A Cube Entertainment read, "Huh Gak X Who?" made fans of the balladeer curious about who the collaborating artist would be for his next release.

In a teaser revealed before the song's release, it was shown that rapper Simon D would be the one.

The Superstar K2 winner teamed up with the former Supreme Team member for "Day N Night," a song that blends their two musical genres with ease. Huh Gak's emotional voice and Simon D's rap make a perfect combination for the song.

The collaboration comes after a long line of successful duos featuring female vocalists and male rappers such as Soyou and Junggigo, Raina and San E, and most recently IU with Korean hip-hop legend Seo Taiji.

Will the male vocalist-male rapper combo be as successful?

Listen to it below: