Krystal wrote on her me2Day on Sunday, "This is another picture that was from a while ago. This was when we were happy and were taking a lot of pictures."
In the picture, Krystal and Luna were close to each other and making cute facial expressions. Krystal kissed Luna on the cheeks and attracted attention.
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Internet users have commented, "They both look so sweet," and "I want to be kissed by Krystal too."
f(x) has recently been busy with their individual activities.
Photo Credit: Krystal's me2day