WJMK (우주미키) is a dynamic and captivating four-member special project unit formed through the collaboration of Starship Entertainment and Fantagio Music. This unit showcases the talents of Seola and Luda from WJSN, as well as Yoojung and Doyeon from Weki Meki. Their debut on June 1, 2018 with the powerful single "Strong" marked the beginning of their exciting musical journey.