On February 6, 2018, an image teaser was released online, revealing that the group will be releasing their seventh EP, Black Dress, on February 22. Two days later, a comeback schedule was released, revealing that starting February 12, the group will release image and video teasers ahead of an online release on February 22, and a physical release a day later. On February 12, the agency stated that their upcoming EP "will show off its charm and maturity by focusing on a chic and charismatic performance with a hip-hop, EDM and dance-based composition". A day later, behind the scene photos were revealed. On February 14, the pre-order for the album was opened for online and offline music sites, revealing that the EP will contain a booklet of 146 pages, a post card, a photo card and a poster of the group. It was also revealed that a postcard and stamp sticker set will be available for those who buy the album on 20SPACE. On February 18, the full track list was release, revealing the title track as "Black Dress". On February 19, an audio snippet for each song was released on the group's official YouTube channel. The EP was released on February 22, 2018, through several music portals, including MelOn in South Korea and iTunes for the global market.
Promotion
Singles
"To the Sky" was released as a digital pre-release track on February 1, 2018. On February 9, a choreography practice video was released for the song. "Black Dress" was released as the title track in conjunction with the EP on February 22, alongside its music video. The song expresses the woman's mind to seduce the other person with a fashion item called black dress. It is a song with a heavy beat and addictive sound. The music video is directed by Kim Ji-hoon. On February 20, the first music video teaser was released through the group's official YouTube channel and their distributor channel, 1theK.
Live performances
Music show promotions commenced on February 22, on Mnet's, M Countdown, performing the title song, "Black Dress".
Commercial performance
Black Dress debuted at number 11 on Billboard's World Albums Chart, on the week ending March 3, 2018. It also debuted at number 12 on the Gaon Album Chart, on the chart issue dated February 18–24, 2018. The album placed at number 35 for the month of February 2018, with 4,671 physical copies sold.
