On July 7, 2002, the main lyricist Mai Matsumuro left the group to pursue a solo career. After Matsumuro's departure, Avex held another audition to replace Matsumuro. Instead of one, six new members won the audition, resulting in an eight-member (Dream) group with the debut single "Music is My Thing". On March 2004, Risa Ai left to pursue a solo career. They became a 7-member group as performed this way until 2007. During this time, the band's name changed from dream to DRM.