A musical battle between 6 trending girl group acts, in order to "determine the real number one" when all 6 release their songs at the same time.
8/29/2019
6 Kpop Girl Groups (AOA, Mamamoo, Lovelyz, Oh My Girl, (G)I-DLE, plus one secret competitor) compete in a comeback war. In this episode, the groups learn who their competition is for the first time, fight over performance order, and the secret sixth challenger is revealed.
9/5/2019
After an inspiring start by Mamamoo and Park Bom last episode, Oh My Girl, (G)I-DLE, Lovelyz and AOA perform their hits. The shocking 66 Drop rule is announced, where a team losing twice in a row is kicked off the show. Oh My Girl gets bad news.
9/12/2019
Mamamoo and AOA cover each other. A backup dancer choice raises eyebrows - and rankings, as does a surprise guest.
9/19/2019
A Queendom quest affects the cover song competition. Two groups that did poorly last competition make desperate and surprising choices, hoping for a big payoff.
9/26/2019
The lead singer and lead dancer from each group collaborate and compete as units. The singers fight over who gets a duet with Hwasa.
10/3/2019
The dance unit leader is chosen, and a legendary choreographer joins the unit. The voice units perform a demo. The groups become closer with each other at a retreat.
10/10/2019
The vocal and dance units perform.
10/17/2019
The "Fandoras Box" challenge, where each group performs a fan-chosen song.
10/24/2019
The winners of the combined Vocal Unit, Performance Unit, and Fandora contests are announced.
10/31/2019
All the groups perform their comeback hits. A winner is announced.
