In 2009, Secret signed a recording contract with TS Entertainment and released their first single "I Want You Back" which became their first music video.

[1] Secret's first music video to receive attention in South Korea was "Magic" and became one of their popular songs because of its choreography.

[5][6] Secret continued to channel the image of their previous single with the release of "Starlight Moonlight" and maintained the "retro" theme.

[7] In July and November 2011, the group began to expand in Japan with the release of the Japanese remake of "Madonna" and "Shy Boy".

[1] The lead single, "Love is Move" featured the genre of surf rock and signaled the return from their sexy image.