Just a little book of Johnlock one-shots that have fluff and maybe smut ;) you'll have to read and find out.

Castiel Novak wasn't very popular in his old school. In fact, he was bullied. Not until he goes on an exchange program and is nicely taken in by the Winchester family does he realize just how much trouble he's getting into, by living with the most popular, green-eyed, bad boy he's ever met.

Rocky Horror does teach us something