N.A.P. Entertainment's rookie male group HIGH4 is going to be making their comeback next monthin early January.

The four member pop group made their debut in April of 2014 through a collaboration with female vocalist IU. Sunggu, Alex, Myunghan, and Youngjun sang with their soft voices as they charmed the ladies with their beautiful single titled, "Not Spring, Love, or Cherry Blossoms."

The group later released a sophomore single titled "Headache."

On December 28th, HIGH4 released a teaser video for their upcoming single titled, "Day By Day." The song is composed by PK and will be co-produced by Choi Kap Won and Lee Jong Hoon.

HIGH4's new single is scheduled to be released on January 5, 2015. The song has a hip-hop tempo and is about a guy who cannot forget the woman he loved after they break up.

Along with their comeback scheduled for next month, HIGH4 will also make their debut in Japan on February 7, 2015.