ONF debuted on August 3, 2017. On August 23, 2019 it was announced that Laun withdrew from ONF and that his contract with WM Entertainment was terminated due personal reasons.
MK started his mandatory military service as an active duty soldier on December 21, 2021. His military service is expected to last until June 20, 2023. J-US and Wyatt started their mandatory military service as active duty soldiers on December 27, 2021 and it’s expected to last until June 26, 2023. Hyojin & E-TION started their mandatory military service as active duty soldiers on December 28, 2021 and it’s expected to last until June 27, 2023. U doesn’t have to enlist since he’s a Japanese citizen.
- Hyojin (Kim Hyojin): April 22, 1994
- E-TION (Lee Changyoon): December 24, 1994
- J-US (Lee Seungjoon): January 13, 1995
- Wyatt (Shim Jaeyoung): January 23, 1995
- MK (Park Minkyun): November 16, 1995
- U (Mizuguchi Yuto): March 16, 1999
- Laun (Kim Minseok): August 12, 1999
- Korean website
- Japanese website
- Official fancafe