Upon releasing "Kiss on the Lips" in February, the girls made a vast transformation with a sexy concept, as opposed to their former concept of an ensemble girl group with their power vocals.

Their comeback song also sported the 'Voguing Dance,' like a model walking freely on the runway.�The girls commented, "Since our outfits were tightly fit, many commented on 'having nice bodies.' It was a bit awkward to hear that since we didn't get much attention for our appearances in the past. We did work out a lot this time so we lost some weight and gained muscles too."

They went on, "We think it's an advantage to be able to look mature compared to our actual ages." �Regarding fans, they added, "Our fan base has expanded as well. We recently met with many newcomers."

Recently coined the 'military girl group', the members jokingly said, "It makes us want to join the army," laughing among themselves.

SEE ALSO: Park Bo Gum reveals why he was disappointed by fellow 'When Life Gives You Tangerines' actor Lee Jun Young