Sparkling (2021 girl 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 March 12, 2021, Future Idol Asia introduced Sparkling and its members through their YouTube, FutureIdolTV. While pre-debut, Sparkling 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.

Throughout the next couple of months, FutureIdolTV uploaded several dance and song covers of the individual members before finally announcing their upcoming debut on August 17, 2021 with the release of their self-titled debut single "Cheerful" and as the sixth girl group in the debut project. Additionally, the girl group originally contained eleven members, however, by August only seven remained to debut.