Vanilla (group)

In 2020, Rainbow Company (later known as Rainbow E&M) created Future Idol, an idol development project for the purpose of debuting various project idol groups throughout 2021 through its project, known as 'Future Idol Asia'. On April 28, 2021, Future Idol Asia introduced Vanilla and its members through their YouTube, FutureIdolTV. While pre-debut, Vanilla was one of several teen idol groups who performed a showcase at YES24 Live Hall on May 23, 2021 as part of the 'Future Idol Debut Project' event.

A dance cover video uploaded on June 12, 2021 revealed that a new member was added to make the final group line-up eleven members. On October 22, 2021, Vanilla revealed the teaser for debut digital single, "Teach Me", set to officially release on October 29. The single was then released, marking their official debut.