It was formed by Star Empire Entertainment in 2014.
Star Empire Entertainment began releasing teaser pictures of their first project-unit on August 22 that included Nine Muses member Gyeongree and So Jin and ZE:A member Kevin .
[1] The unit was announced to be called Nasty Nasty and debuted on September 3, 2014 with their title track "Knock.
"[2] On January 11, 2015, Sojin was announced to be joining the new line-up of Nine Muses along with another trainee Keumjo after the departure of three of its members.
[3] She made her debut into the group through their single, "Drama", the title track from their third mini-album.