The Red Thread (слэш)

"Sherlock nearly places the book aside, uninterested in children's tales and already growing bored, but a detail makes him pause. There is a crack in the spine, and when he lets the book fall open in his hands, it's clear that a child has pushed the pages of one story flat more times than any other, leaving broken binding and dingy marks on the edge of the page. John's bookmark makes a red slash across the print. When John was Johnny, a chubby and wide-eyed child far removed from the man that he would become, he returned to this story more than any other. And even now, he has returned to it again, adding an unnecessary marker to a page that he is in no danger of losing.
Tucking the bookmark behind the front cover, Sherlock begins to read."
Sherlock doesn't believe in gods, but perhaps he and John have managed to tie their own red thread of fate.