tripleS continued to roll out teasers for the 'Assemble' comeback. 

On January 23 at midnight KST, TripelS released its new 10-member subunit's individual concept photo for member SooMin. The new subunit consists of members Kim YooYeon, Kim NaKyoung, Gong YuBin, Jeong HyeRin, Yoon SeoYeon, Kim ChaeYeon, Lee JiWoo, Kim SooMin, Kaede and Seo DaHyun.

tripleS is a rookie girl group with 24 members and a unique system called "Dimension." Under this system, fans get to choose the members who will be part of the subunit group promotion through voting.

Named 'Rising', the new 10-member "Dimension" will release 'Assemble' on February 13th.