The group consists of seven members: Kunho, Youmin, Xayden, Minje, Masami, Hyunbin, and On:N. They debuted on January 10, 2024, with the extended play (EP) All Ours.

[1][2] On November 24, Eden Entertainment announced that they planned to launch their first boy group, All(H)Ours, in early 2024.

[7] On December 19, the group announced that they would debut in January 2024, with the released of a video titled 'Preview of All(H)Ours' on their YouTube channel.

[9] On January 10, All(H)Ours made their debut with the release of their first EP All Ours alongside the single "Gotcha" and its music video.

[14] As the first Korean idol group to debut in 2024, the members expressed their ambition to leave a mark throughout the year.