[1] The chorus group named Ko Spellers (子スペラーズ) was formed in 2001 with the members Nagi, Mi-Mi and Meg.
On April 25, 2007, the band debuted on Rhythm Republic, Avex Group's indies label.
As their popularity grew, they were transferred to the major label Rhythm Zone.
On January 16, 2008, the band released their first major label mini-album named Brightest Star.
[2] On April 17, 2013, it was announced on the group's blog that Bright would disband after their final One Man Live concert on May 12.