[1] It was released online for download on October 25, 2019, by Stone Music Entertainment.

The program is a comeback battle between six trending girl group acts, in order to "determine the real number one" when all six release their songs at the same time.

"Destiny" was later included in Mamamoo's second Korean studio album Reality in Black, released on November 14, 2019.

"Wanna Go Back" was later released alongside Park Bom's single First Snow, on December 10, 2019.

"Guerilla" was later included in Oh My Girl's third Japanese studio album Eternally, released on January 8, 2020.