In June 2020, Lee Hyori joked about forming the ideal girl crush girl group with herself, Jessi, Uhm Jung-hwa, and MAMAMOO's Hwasa. In a later episode, she shared the idea of having Yoo Jae-suk, the main entertainer on Hangout with Yoo, as the group's manager. After the episode's broadcast, all three mentioned singers responded positively to Hyori's idea and were willing to participate in the project. The concept also received positive support from the public.
