Check out the MV Teaser for f(x)'s '4 Walls'

Following their teaser pictures, f(x) has now revealed the the teaser for their music video!

Check out their mesmerizing MV teaser for '4 Walls' below~

♥ Preorder f(x)'s 4th album '4 Walls'

♥ More about f(x)'s '4 Walls' here