ONF, pronounced “on and off," debuted in 2017 with single “On/Off.” It consists of five Korean members — Hyojin, E-Tion, Seungjun, Wyatt and MK — and one Japanese member, U.

ONF is coming back next month! On January 20, ONF’s agency WM Entertainment confirmed reports about the group’s comeback, announcing, “ONF is currently preparing with the goal of releasing a ...