Krystal introduced the tracks from f(x)'s '4 Walls' through her broadcast (English Subbed)

Time to meet Krystal through 'V' broadcast.

Here's her video where she introduced the tracks from f(x)'s latest album named '4 Walls'~

♥ Preorder f(x)'s 4th album '4 Walls'

♥ More about f(x)'s '4 Walls' here

Credits:
Naver's V