The Shadows that Define our Every Sunny Day (слэш)

“They were living together only a few weeks before Sherlock noticed it. Everything about John screamed practical and straightforward except for this. If the detective hadn't known better he would have said John was superstitious. It was little things at first, like nodding at magpies whenever he saw them or only chatting up women on Tuesdays. But that wasn't quite right. If these peculiarities were superstitions, they were ones he had never come across before. Finally, Sherlock chalked it up to an atypical symptom of his flatmate’s PTSD and left it at that. He would have never thought of it again until Autumn stole across the city and John started acting, well… stranger.”