jimin was the sun and taehyung lived in the dark

or

"taehyung's faintly remembers his mother telling him 'don't stare at the sun for too long, it'll damage your eyes,' what she forgot to mention was that the sun had a name and the light he emitted was oh so alluring. he's sunburnt, he decides that must be the explanation for the pain he feels in his chest when he looks at jimin (too bright, too close: better back away.)"