SHINee's member Key and f(x)'s members Sulli and Luna revealed their team-like chemistry.

On January 15, Key posted on his Instagram, "oppa and kids" along with a picture.

In the picture, Sulli and Luna are sitting in chairs and Key is standing next to them. They look cute together like a group.

Internet users who saw this commented, "It's good to see that you guys look close," "The siblings of SM," and "How cute."

Both of them attended the SM Town Coes Artrium opening event held on January 13.