On August 6, 2012, the title track of the Pandora album was revealed. The song was apparently leaked at KBS' radio show, 2FM Super Junior's "Kiss the Radio" on August 17. Following the leak, the group's representatives and the staff working for the show apologized on Twitter and posted a message on the radio community board.

On August 7, 2012, the EP's title was revealed by Kara's agency and explained its origin from Greek mythology. The concept of the album was to show the group's matured charms through a modern interpretation of Pandora's Box. Steward Ho for M.net noted that the group were about to "ditch their younger image and look more like empowered women".

Group member Nicole Jung stated during the album's show case that the group aimed to display their "maturing feminism".

The EP contains four songs plus an instrumental version of the title track. The group worked with Han Jae-ho and Kim Seung-soo along with Sweetune, who produced most of the group's past material. The title track, "Pandora", is a synthpop dance track.

The group held a showcase to promote the release of the Pandora EP at the Seoul Walkerhill Hotel on August 22. The event was streamed live at M.net Global's website. The group's agency also stated that the members are devoting themselves towards the promotion of the album in South Korea.

Live from Seoul Walkerhill Theater
Host: Kim Ji-hyeon

The group began their weekly promotions for the album starting on KBS' Music Bank where they performed some of the album's songs including "Pandora" and "Miss U".

A promotional truck that was entirely covered with the album's jacket cover traveled through various parts of Seoul, including Gangnam, Hongdae, Itaewon and Myeongdong.

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Wikipedia