WJSN members Seola, EXY, Bona, and Eunseo have been confirmed as the members of the new subunit, "WJSN: The Black," set to make their debut on May 12.

Starship Entertainment first teased the new Cosmic Girls' subunit with a teaser poster last April 26, sending the K-Pop fandom into a frenzy, The black and white poster only features the words "WJSN: THE BLACK" followed by the phrase "MY ATTITUDE" and the names of its members - Seola, EXY, Bona, Eunseo - followed by the words "Coming Soon, 21.May.12."

(Photo : Starship Entertainment)

ALSO READ: WJSN Releases New Batch of Individual, Group Concept Photos for 'UNNATURAL''

Following materials released on the group's social networking sites confirms that their debut release will be titled "My Attitude," set for a May 12 release.

In a statement, Starship Entertainment explains that the "sophisticated and chic black background" is a nod to the subunit's concept, and has been successful in raising curiosity and excitement among the fans. Black has become a representative color that easily blends with other colors, with its associations and versatility being loved by a lot of people. In the same way, WJSN: The Black is will be bringing something mysterious and versatile, set to earn the admiration of the K-pop industry.

Since the first teaser for "WJSN: The Black," fans have been raving about the new Cosmic Girls' subunit. On their Instagram post, fans have commented that "The K-Pop industry is not ready for this" and others calling the subunit as "The Boss Unit."

WJSN: The Black is the latest subunit to debut after WJSN: Chocome. The Black's monochrome and seemingly mature concepts are in stark contrast with WJSN: Chocome being bright, colorful, and cute - a concept that the subunit members Soobin, Luda, Yeoreum, and Dayoung perfectly captured with their debut single-album "Hmph!" 

RELATED ARTICLE: WJSN Sub-Unit CHOCOME Wins Idol Unit Category in the '2021 First Brand Awards'