Title: Le coeur a ses raisons que la raison ne connaît point
Author: FivePips
Fandom: Sherlock
Characters: John/Sherlock, Mycroft
Warning: R, mention of slash, drug abuse
Length: Medium
Status: Completed
John stops a man from beating up Sherlock in an alley the night before he is about to go off to Sandhurst. Somehow they become pen pals and best mates...but of course there's something that neither of the two men could have predicted.
At AO3
It's not one of the best written stories ever. It's not a primer for representation of drug abuse in literature. Yet this story shows a tentative friendship turning into (un)requitted love. Hardships, uncertainty and in that way, it is one of the stories that deserve the tag romance the most.