On July 16, 2012, D-Business Entertainment stated that the group would show their debut progress to fans through a reality TV show called "Welcome to D-Unit" and would air on July 18, 2012.
Pada tanggal 16 Juli, D-Business Entertainment menyatakan bahwa grup ini akan memperlihatkan kemajuan debut mereka ke para penggemarnya melalui acara realitas televisi berjudul "Welcome to D-Unit" dan akan mengudara tanggal 18 Juli 2012.