What do you mean JK and Jimin are total opposites? I'm curious!
In the last bangtan bomb while jungkook was in all black (hair and eyes included) jimin was in white, blond, blue contacts.
Even their features in general are totally opposites. Their size difference
Jk: big round eyes, “big” nose, thin lips
Jm: elongated eyes, small nose, plump lips
Listen they just match perfectly