It was recently revealed that f(x)'s Krystal and Sulli had secretly traveled to Jeju Island for a photoshoot with casual clothing brand 'QUA'. The girls stayed in Jeju Island for two days for the photoshoot with a 'Travel Diary' concept. Krystal and Sulli look comfortable and laidback in the released teaser shots as they pose for the camera on a bed surrounded by cushions and colorful pastel-colored balloons. In the photos, the f(x) members look like they are about to head out the door in their casual yet chic outfits. Sulli is seen displaying warm and cozy look while wearing a loose brown cardigan and beige knit beanie hat, and Krystal is wearing a navy knit dress with colorful stripes, and accessorized her outfit with a stylish black hat. Krystal and Sulli's 'Travel Diary' photoshoot will be revealed through QUA's site in October. Source + Photo: TV Report via Naver