ONF (Hangul: 온앤오프; short for On N Off), also known as On and Off, is a South Korean boy group formed by WM Entertainment in 2017. The group currently consists of six members: Hyojin, E-Tion, Seungjun, Wyatt, Minkyun, and U. Laun left the group for personal reasons in late August 2019. The group debuted on August 3, 2017, with the title track ON/OFF, from their extended play of the same name. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.