WJMK (; short for Wuju Meki) was a four-member special project unit group between Cosmic Girls and Weki Meki created by Starship Entertainment and Fantagio Music. It is composed of four members: Seola, Luda, Yoojung and Doyeon.

History 2018: Debut with "Strong" On May 2, 2018, Starship Entertainment and Fantagio Music announced the special formation of the project unit and released teaser images online. Promotional images were released throughout the month with bright color concepts. On June 1, their digital single "Strong" was released along with its music video.

Members Seola () Luda () Choi Yoo-jung () Kim Do-yeon ()

Discography Singles TitleYearPeak chart positionsAlbumKORPeak Gaon Chart Digital Chart Ranking "Strong (짜릿하게)" 2018 — rowspan="1" "—" denotes releases that did not chart or were not released in that region.

Videography Music videos Year Title Director(s) Ref. 2018 "Strong" (짜릿하게) Zanybros

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