Jewelry brand STONEHENGE has released a making-of its photo shoot with the 'Jung sisters', Girls' Generation's Jessica and f(x)'s Krystal.

In the clip, both sisters are interviewed about the moments they look most beautiful. Jesssica answered, "I guess since I'm the unni, I feel [most worried] when I see my little sister working. I feel most at ease when she's resting peacefully at home, and she's most beautiful then too." Krystal replied, "Unni looks most beautiful when she's eating. I made her food once, and I felt so proud."

Jessica and Krystal dressed in wedding dresses for the shoot, and the older sister commented, "Before the photo shoot, I thought about it. How I would tell Krystal if I were to actually get married. I started tearing up." Krystal remarked, "Why are you about to cry?" Her older sister responded, "I think I won't want to separate. I got really sad."

Krystal smiled as she assured her, "I think I'll have to look after my older sister. I have to prepare food for her and clean up after her. I think she'll always call me over to her house too. That's why we won't be separated."

Check out the making-of clip below!