[3rd Anniversary Special] What has happened so far..?

Why Koreans care

절친 (jeolchin, best friend) means an exceptionally close friend, not simply a good friend. That stronger label drives the episode’s joke: the members insist they are awkward or have only just met while the quiz supposedly determines whether they truly qualify as 절친 (jeolchin, best friends).

In the Korean comments

One comment pinpoints a tiny shift in address: in translation, “Siyeon called Dani ‘you’ and immediately sensed death.” It identifies the brief 니 (ni, you) exchange as a moment worth watching for, because the cast instantly treats the wording as dangerously blunt.

What the words mean

니 (ni, you; very casual and blunt) (ni) literally means “you,” but it is a very casual form that can sound startlingly blunt depending on tone and hierarchy. Here, that edge—not the basic meaning of “you”—explains the cast’s exaggerated alarm.