[1] LOEN Entertainment confirmed that they will be releasing a six-member girl group coming from various countries.

It is confirmed later when they released teasers of Yezi and Cheska's raps, along with the dance cover of SHINee's Lucifer by the group.

Before the group's debut, they released a collaborative song with IU entitled "Sea of Moonlight".

[2] One week before their debut, Fiestar collaborates with Tiger JK to release "Wicked", a song influenced by electronic house music and reggaeton combined.

Jei goes to Vista, an audition show, and is shown seating with Sunny Hill's Seungah reprising her role as Wonder Woman.