The official music video for by the K-pop girl group T-ARA was released on October 10, 2013 . It served as the title track for their eighth mini-album, Again . Key Video Details

The song was co-composed by Shinsadong Tiger and Choi Gyu Sung. The choreography was created by Yama & Hotchicks .

In July 2024, "Number Nine" became T-ARA's first music video to reach 100 million views on YouTube. Where to Watch

The video features a "mature beauty" aesthetic. It portrays the members in a desert setting and individual rooms, using symbolic imagery like burning books and film to represent heartbreak and the loss of love.

The video features the group's six-member lineup: Soyeon, Boram, Qri, Hyomin, Jiyeon, and Eunjung .