Can Sungji call Seju "Unnie"?
=))))))))))))))), OH, you know this word =)))))))))))), do you know "oppa", too? xDDDDDDDDDDD
She can if they're close enough =)))))) but it has to have Seju's agreement on that xDDDDDDDDD, cause that's already an informal word xDDDDDDD. She has to ask first if she could call her like that, and if and only if Seju agrees, she gets to call her that =))))))))))))))), she can't jump to call Seju that right away no matter how much she wants