After a short break, SM Entertainment announced that the girls would be back with a new single and showing a "Marine Girl" concept; the song, titled "Sowoneul Malhaebwa (Genie)" (, lit. "Tell Me Your Wish"), the mini album was released digitally on June 22, 2009. The mini-album includes a duet between Jessica and Shinee member Onew called "One Year Later". During the group's promotion, the girls would be seen wearing marine uniforms as part of the album's concept.