if you look closely at the first gif, it looks like xiumin is saying “나니” (nani) or more likely “하니” (hani/honey)
which makes luhan go “뭐라 그랬어/뭐라고 했어/뭐라고 말했어?!” (mwora geuresseo/mworago haesso/mworago malhaesseo? = all different ways of saying what did you say?)
and then we have both of their embarrassed reactions afterwards lol. partial fanacc taken from here.
qt minseok during #growl12thwin
how to successfully cockblock xiuhan by Jung Heechul
minseok’s aegyo giving zitao goosebumps