The song "Secret" was released as the lead single from the EP with a Chinese version also included.

The Secret was released digitally on August 17, 2016 through several music portals, including iTunes for the global market.

[1][2][3] On August 17, WJSN held a showcase to celebrate the album release, performing for the first time the new songs, alongside past singles.

[4][5][6] On August 18, the group held their first comeback stage on Mnet's M Countdown performing "BeBe" and "Secret".

[11] The mini-album entered at number 15 on the Gaon Album Chart for the month of August 2016 with 8,629 physical copies sold.