Let's see ... Kai's featuring in f(x) teaser photo. 

Let's take a look. ^^ 

There's two friends (Sulli and Krystal), who are probably in love with that same game over there (Kai). Krystal became possessive and hit Kai - that's why he has a band aid in his face. Sulli is sadly by his side not knowing what to do, though she wants to help him without knowing how.

Hahahahaha lol vast imagination. XD Whatever. ^^

I'm so excited for their comeback! f(x) fighting!!!! :D

They really pull this vintage concept so well. :) #Proud.