The group was formed by YouTuber Mikki under the name MiKiOdA Idol Project in 2021. Out of 15,000 submitted applications, seven people were selected as members: Ohara Otoha, Kikyou Hanaka, Takanashi Ami, Himemiya Yuka, Saiki Nanami, Shinonome Sora, and Tsugumi Noa.
The first iteration of the group ended activities on December 5, 2022, following Mikki's departure from the role of the producer. They had a re-debut with the same line-up but under the new name AVAM on April 4, 2023—a year and a half after their original formation. The new name was coined from the Latin word "ave" and from the Japanese spelling of the word "moratorium" (モラトリアム, moratoiamu).