On the 28th of February, Lee Jong Suk updated his personal me2day page with the words, "Walking around backstage talking pictures" 

His post included a photo taken during his walk backstage. The picture showed Lee Jong Suk smiling brightly with his mouth open. Next to Lee Jong Suk, Crystal of f(x) can be seen smiling away while she is squeezing her nose. In the picture, Crystal and Lee Jong Suk looked like siblings.

Netizens who saw the photo responded with comments like, "Both of them are so cute~", "I only see Jong Suk... He's so good looking.. I want a boyfriend like him", "They look so good together. When I watch them together on High Kick, I get so happy" and etc.

Lee Jong Suk and Crystal of f(x) are currently appearing as siblings in the sitcom "High Kick"