Meeting you was the first day of the best of my life

"The first time they met, Sherlock was working undercover- John still doesn’t know what the case had been about, but considering the strange turn of events his life had taken after that fateful meeting, he thinks he’s hardly to blame.

The second time they meet, it’s an accident- quite literally- and John almost kills him in the process. "

Train station AU (sorta) of the five times Sherlock and John meet :)