D-Unit (Korean: 디유닛) is a South Korean girl group under the label D-Business Entertainment. The groups concept includes the addition of a new member with every promotion cycle. The group debuted as a trio consisting of Ram, UJin and Zin with a full-length album, featuring the title track "I’m Missin’ You" on August 1, 2012.This was followed by their debut stage on August 2, 2012 on M!Countdown. In March 2013, D-UNIT added their first guest member, JNey, a member of GP Basic.