A study behind closed doors -- a Johnlock fanfiction

Sherlock Holmes -
Sherlock is a closeted 18 year old. He's a high-functioning sociopath as the psychiatrist he visited when he was 15 said. He is the social outcast at Saint Bartholomew secondary-school in London, UK. He's picked on by most of his classmates but they usually just laugh, All except two... Philip Anderson and Sally Donovan. He does however have one friend, Greg Lestrade. He's also closeted.

John Watson -
John is 26 years old and in his second year of teaching. He's the type of teacher to recognize when a student is going through a tough time and do whatever he possibly can to help the student through it, He'd do that for really anyone even though he doesn't get the same in return... He's married to his wife of two years even though he's very unhappy and has been since the start. Oh, and he's a closeted bisexual.

Greg Lestrade -
Greg is 18 years old and Sherlock's one and only friend as they share multiple common interests, drinking, smoking, abusive fathers they no longer live with. He's also dating Molly Hooper.

Sherlock and John meet.