EL7Z UP (엘즈업) is a seven-member project girl group that Apple Monster and DG Entertainment selected through Mnet's survival program Queendom Puzzle in 2023, and the name is an anagram of PUZZLE in reverse order. The group consists of 7 already debuted idols: Hwiseo, Nana, Yuki, Kei, Yeoreum, Yeonhee, and Yeeun. The final lineup was announced on August 15, 2023, during the final episode of Queendom Puzzle. They debuted with the mini album “7 + UP” on September 14, 2023.