As expected it's an all-kill for f(x)'s '4 Walls'!
After its released last midnight, f(x)'s '4 Walls' has managed to top various music chars like Melon, Soribada, Monkey3, Bugs, Genie, Naver Music, and Olleh Music.
We all know that this is just the start. Welcome back and congratulations f(x)!!
Meanwhile, f(x) will kick-off their promotions at M Countdown on October 29.