He puts the file down, scribbling his diagnosis on a post-it note and sticking it to the cover of the file before reaching for the next –

            Bang.

            Luhan practically jumps out of his seat, startled.  He looks at the doorway, expecting to see his supervisor standing there with a stack of files (Joonmyun has a habit of making loud entrances), but it’s not him.

            No, standing in that doorway is the big, the bad, the one and only Oh Sehun.