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.
'Standby IOI' is a sequel reality program showing the debut process of the members who were chosen through 'Produce 101.' It will be filled with every movement of the members who are preparing to release their debut mini-album on May 4 and actively promote. We will show their image on set of practice, photo shoots, and of course their recordings.
Yoo Yeon-jung (Korean: 유연정; born August 3, 1999), known mononymously as Yeonjung, is a South Korean singer signed under Starship Entertainment and Yuehua Entertainment. She is best known for being a member of the South Korean-Chinese girl group WJSN, and for finishing 11th in the survival show Produce 101, making her a member of I.O.I.