SECRET member Hyosung's first single album \"Top Secret\" came out May 12th 2014, along with the music video for her title track \"Goodnight Kiss,\" ending the wait for fans who were captivated from the beginning with the album teaser, highlighting her unique vocals and Duble Sidekick's addictive melody. On the new music video, TS Entertainment said, \"The music video perfectly captures Hyosung's alluring qualities against the dreamlike background of the video. With a concept of both innocent and sexy, the video is a feast for the eyes, with a total of eleven different outfits.\" The music video also shows clips of the powerful dance performance for the song.