Composers Dsign Music, Yoo Young-jin, Kenzie, Hwang Seong-je and Kim Jin-hwan joined the production of the EP.

The only single off the album, "Genie", is an electronica-style pop song influenced by the European dance genre, featuring a heavily synthesized intro.

The album sold an estimated 50,000 copies in its first week after release (almost double the first-week sales of Gee), an unusual feat for any Korean girl group.

[citation needed] The physical release of Genie was originally slated for June 25, 2009, but was delayed by SM Entertainment in order to redo the album art.

Notable changes included correcting a plummeting plane used as an apostrophe into making it fly upward, the removal of both a World War II Imperial Japanese A6M Zero fighter, and the revision of a slightly modified eagle insignia of the Nazi Party on the cover.