Jimin always try his best to make s happy, even if one would mock him for doing so, but he wanted to show that he is a responsible person. So Jimin thinks he's responsible for the maknae being uncomfortable around him. Well he is, so he tries his best to know where his limits are when the younger is present, that way the younger would just ignore him and say nothing.

Jungkook didn't really pay much attention to Jimin before because when they debuted, he thought that Jimin was just like any other average boys that can dance and sing. So much that he almost think highly of himself, but he is not an arrogant person. He is not. He just somewhat a capable person regardless of his age. That is why he doesn't realized a "pabo" side of him when he teases his hyungs, especially Jimin. "Compare the Jiminie from our debut days to the Jiminie we have now. So