ONF (온앤 오프), short for ‘On N Off’, is currently a 6-member South Korean boy group under WM Entertainment. The group consists of Hyojin, J-US, E-Tion, Wyatt, MK, and U. Laun left the group in late August 2019. ONF has 2 leaders and is divided into 2 sub-units: ON Team and OFF Team. ONF debuted on August 3rd, 2017.