The group was composed of six members: Hyoyoung, Seunghee, Yeonkyung, Hyewon, Eunkyo and Nayeon.

[4] 5dolls released their second mini-album Time To Play on May 11, 2011, with their lead single "Like This Or That" (이러쿵 저러쿵) and the music video.

Han Na-yeon and Shannon were announced as replacements and, in February 2013, trainee Choi Ji-hyun was also said to be joining the group, thus becoming six.

[6] On July 8, 2013, the group officially announced that they would be returning at the end of the month with a new single called "Soulmate #1" as well as a new stage name, F-ve Dolls.

F-ve Dolls followed-up promotions with a new mini-album called "First Love", which was released on September 17.