Lee Hyori
The preparation and creation of the song was the main subject of the reality television show "Lee Hyori X Unnie" on OnStyle Entertainment Channel. In the show, Lee Hyori, a long-established pop star and company colleague, provides counsel to the group, which had struggled to establish success as a group, on making decisions on every detail of a music single promotion, including song-writing, media relations, and styling. Lee Sang Soon, Lee Hyori's partner, was heavily featured on the show and lent his background vocals in the recording.