On August 2, ONF held their debut showcase at Yes24 Live Hall in Seoul where they performed their new songs, talked about their labelmates B1A4 and Oh My Girl, and explained their concept as a group.
Member Laun said, ONF is divided into two teams. The ON team and the OFF team each have three members. The ON team have a bright image with emotional vocals as their key point. The OFF team have a charismatic image with a focus on strong dance performance.