After eight months since their last release, K-Pop girl group Secret made a comeback as a full group and began their promotional performances on KBS's music show Music Bank on August 15.

With Jeon Hyo Sung's sexy narration and vocalist Song Ji Eun's powerful start, "I'm in Love" is a fun, upbeat song with a retro feel and is nicely accompanied by the group's new cute and sexy "mermaid dance." 

Secret also performed another song from their new album Secret Summer.  The song "U R Fired" showed off the chic charms of the members with its addictive melody. 

Secret has also promised to perform the new single with a few special changes if they win first place on a music show.