The beloved girls of f(x) have been busy hyping up their comeback, particularly with their cool, artsy concept titled '[4 Walls] An Exhibit.' From October 21 through 26, at a gallery located in the Itaewon District, the specially designed exhibit showcases the individual member's teaser videos on each of the four walls. 

October 21 officially kicked off the beginning of f(x)'s comeback, starting with teaser images of the beautiful Victoria, followed by the equally stunning Luna. On the 21st, the exhibit showcased Victoria's teaser video and will continue with teasers of the remaining three members. This innovative, fresh approach to f(x)'s comeback is drawing much interest and response from fans and regular citizens alike!