T-ara N4 was the first official sub-group of South Korean girl group T-ara formed by Core Contents Media, now also known MBK Entertainment, in 2013. The sub-group consists of three (formerly four) members: Eunjung, Hyomin and Jiyeon.
In late March 2013, T-ara’s agency Core Contents Media were in the midst of forming a new unit from the group with the members Eunjung, Areum, Jiyeon and Hyomin. The unit’s name, T-ara N4 (which stands for “T-ara Brand New 4”) was revealed April 12, 2013. T-ara previously tried sub-units with the promotions of their sixth Japanese single “Bunny Style!”, in which the B-sides were sung by units of two and three members; however this will be their first time doing formal unit activities.
T-ara N4’s debut single, “Jeon Won Diary” (전원일기; Jeon-won Ilgi), was inspired by the 1980s South Korean drama of the same name. Produced by Duble Sidekick, the song is said to have “funky and intense” dance music combined with elements of hip-hop, with the main motif of “Jeon Won Diary” about breaking away from the same everyday routine.
On July 10, 2013, Areum left the group to pursue her solo career. Core Contents Media announced Areum was replaced by Dani in T-ara N4. Dani was originally revealed as the eighth member of T-ara in 2012 but never debuted with the group. After Areum had withdrawn under T-ara and T-ara N4, Dani only replaced Areum’s position in T-ara N4 in 2013. After their agency renaming in October 2014, their agency initiated Dani to not be part of T-ara N4. However, Dani continued training under the agency and never debuted upon the end of the other member’s contract.