유재석
After SSAK3 project, "Hangout with Yoo" programme has a spin-off from Lee naming Uhm Jung-hwa, Jessi and Hwasa as the members she wanted in her dream girl group during the SSAK3 segment. The four women formed another girl group named Refund Sisters (환불원정대) with Yoo Jae-suk as a producer. They released a debut single "Don't Touch Me" on October 10, 2020.