간밤에 잘 주무셨어요
I was chatting with a friend and narrated a sudden event in which an ex-colleague who had seemed all normal but passed away without any signs. She explained that korean people often ask like that: 간밤에 잘 주무셨어요. Literally did you sleep well last night?
Just curious how it relates to my story? What is the story behind such a question?