what is yn
Y/N stands for "Your Name", it's used in fanfiction so that you can self-insert yourself in the story. But now, it's seen as a whole character of it's own because nobody replaces Y/N by their name cz it's silly and nobody can relate to them enough. The meme is that people around Y/N suffer cz they're just secondary/disposable characters used to move the plot, so any inconvenience Y/N may have can lead to them being terrorized by the Male Lead, who's usually a CEO lol
OMG TRUEEE
First, in my lineage, to witness Someone asking this question
Everyone around me seems to alrdy know what It is!!
the secretary is probably the creator of the yn and ceo trend with the stuff he has witnessed regarding these two