f(x)�will be returning soon and here to start off the teasing process is Krystal, who has definitely surprised fans with her dark look!

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According to SM Entertainment on the 27th, f(x) will make a comeback with their 3rd full-length album 'Red Light' on July 7! This will mark their comeback in a year since their 2nd album 'Pink Tape'.�

In honor of this big announcement, fans were treated to Krystal's teaser image which hints at a dark, almost gothic-like concept for f(x)'s upcoming comeback.

Get ready stop in front of f(x)'s 'Red Light' on July 7!

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[Update] - More photos have been revealed through f(x)'s homepage. Check them out below!