JUNGKOOK and MINGYU even belong to this group of friends called '97-line', which consists of male K-pop stars who are born in 1997.
But it was not like they knew one another before they made debut or anything.
In fact, there was a quite long period where they only knew each other's name and their friendship journey was not as smooth as one would think.

At that time, they happened to stand next to each other on stage.
It looked like they felt too awkward that they avoided making eye contact for a while.
Their eyes ended up meeting, and they bowed to each other in an extremely polite manner.

While on a break, JUNGKOOK approached MINGYU and were seen asking him a question.
After MINGYU answered JUNGKOOK's question, it seemed they both wanted to continue their conversation, but just could not come up with anything to say.
So, JUNGKOOK walked away with an awkward smile a few minutes later.

Since MINGYU patted JUNGKOOK as he was walking by, JUNGKOOK failed to notice MINGYU's gesture and did not turn around to thank him.

Now, they have become such close friends who hang out whenever they have time.
(Credit= Online Community, 'bambam1a' Instagram, 'BTS_twt' Twitter)
(Lee Narin, SBS Star)