WHAT COUPLE MAKES YOU THINK MORE: "AHH... THEY ARE REALLY GOOD FRIENDS"
for me, it will be JAECHUN and HOMIN
JAECHUN

while jaechun's friendship is obvious, yet it is not at all in a fan-servicey way.
there is something very natural and casual about them, and
you can tell that they truely are very very close friends.
not only do they go drinking together, but even in private off-camera
moments, they are always seen engaged in normal, trivial activities such
as looking at phone messages together, private conversations, etc.
things that we and our best friends do together too..
HOMIN

i am sure some people will be like, "what? homin? are you suuurrreeee?"
well, yes i am.

homin is just really understated and we hardly see any fan service of any sort from them,
which makes their bff-ery so much more believable to me.
and coming from the horse's mouth itself, yunho saying that changmin and him are best friends and he confides alot in maknae, i think i am highly likely to take yunho's word for it too.
homin have been room-mates for a very long time. up to the recent switch where yunho now rooms
with yoochun and minsu room together. i believe they are just as close as jaechun are, just that they are not
captured on pics and film as much.
and a small tiny mention.
YUNJAE. i have always seen their closeness as more of a friendship than anything more than that (aka that they are "real"). being closer in age and being the two oldest, put them in a position where they understand each other and the problems the group may face in a similar way, especially relevant in their early days.