In June 2020, Lee Hyori joked about forming the ideal girl crush girl group with herself, Jessi, Uhm Jung-hwa, and MAMAMOO's Hwasa.

After the episode's broadcast, all three mentioned singers responded positively to Hyori's idea and were willing to participate in the project.

Like the SSAK3 project, all proceeds from Refund Sisters' promotions will be donated to charities.

The group released their debut single "Don't Touch Me" on October 10.

The official MV for "Don't Touch Me" was released on October 28.