Girls' Generation Jessica revealed her love affection toward her little sister, f(x)'s Krystal.

Recently, the making video of Jessica and Krystal who are working as sister models for a jewelry brand was revealed online.

In the video, Jessica was asked, "If you actually get married?," and she replied, "If I actually get married, I thought about what I would say to my sister the night before the filming day. And I started crying," tearing up.

She said, "I don't think I would want to be separated from her. Sad feelings came up."

At this, Krystal said, "I think I'm going to have to take care of her. I'll cook for her and organize for her. I think she'll always call me over to her place. So there will be no such thing as being separated," smiling.

Photo Credit: Stonehenge Making Video