Written and produced by Brave Brothers, it was released physically and digitally on January 16, 2014 by FNC Entertainment.

[1] Member Youkyung didn’t participate in the single album release due to the restrictions reasons.

The song was AOA's commercial breakthrough, reaching number 11 on South Korea's Gaon Digital Chart, making it their first top twenty entry.

[7] On July 11, 2014, it was revealed that AOA would be performing at the Japanese music festival A-Nation held on August 17 in Yoyogi National Gymnasium in Tokyo, Japan, as the only girl group from South Korea.

[8] On August 12, 2014, it was confirmed that AOA would perform at "Tokyo Runway 2014" which was held on September 7 at the Makuhari Messe Event Hall.