In the D-8 teaser clip for their upcoming reality show, Jessica and Krystal are being silly inside a car.
According to a report on Daily K-pop News, Jessica suddenly csaid to Krystal, "Ya you're ugly!" to which Krystal replied, "Is that so.. aww ugly," and then they laughed among themselves.
However, Jessica made herself clear through a weibo post as she explained that Krystal is her very pretty sister, and that's why she can call her 'ugly'.
However, she pointed out that only she can call her that and even wrote, "If you call her that, I'll look for you," showing her protective side.
They are cute, aren't they? Watch below: