f(x)'s Krystal paired up with 'Unpretty Rapstar's Kisum for their 'White Tampon' CF!

Kisum rapped the song for Krystal's MV, and the song urges women to have confidence in their white outfits even when it's their time of the month. Both of them look amazing in the videos, so check the song out above and the CF out below!