On November 24, Cube Entertainment announced that HyunA and Hyunseung would form a sub-unit.

[4] On November 26, 2011 Trouble Maker released the track listing for the then-upcoming debut album as well as an audio teaser.

[1] On December 6, 2011 HyunA and Hyunseung performed as Trouble Maker at the United Cube concert in London as part of their promotional tour.

[7] After promotions for Trouble Maker began, the duo were forced to change their choreography due to it being considered too sexy for national broadcast.

The song also received numerous first place award in various music show broadcasts, a triple crown in Mnet's M!

[10] At the end of the music video, HyunA sets the hotel room on fire, trapping Hyunseung.