On January 3, 2012, DSP Media announced that a section of the group will be formed as a trio.
On the same day, DSP drops a teaser image with revealing "Rainbow Pixie" as the trio's name.
On January 4, 2012, another image revealed the members of the group as SeungAh, Jisook and Hyunyoung.
The group released their debut song, "Hoi Hoi", on January 12, 2012, and held their first performance on Show!
Music Core.

Rainbow released a Japanese single on March 14, 2012, entitled "Gonna Gonna Go!" (
Japanese: ガナガナGO!).
Their Japanese debut album, Over the Rainbow, was released on March 28.

The group released the first part of their first studio album, Rainbow Syndrome, on February 13, 2013.
On January 3, 2012, DSP Media announced that a section of the group will be formed as a trio. On the same day, DSP drops a teaser image with revealing "Rainbow Pixie" as the trio's name. On January 4, 2012, another image revealed the members of the group as SeungAh, Jisook and Hyunyoung. The group released their debut song, "Hoi Hoi", on January 12, 2012, and held their first performance on Show! Music Core.
Rainbow released a Japanese single on March 14, 2012, entitled "Gonna Gonna Go!" (Japanese: ガナガナGO!). Their Japanese debut album, Over the Rainbow, was released on March 28.
The group released the first part of their first studio album, Rainbow Syndrome, on February 13, 2013.
Rainbow (group)