Trickster by Willow Rosenberg

Rated: 3rd-5th Years •
Summary: After the disastrous events of the end of the Marauder's fifth year, a fuming Lily Evans decides that that arrogant James Potter and his friends need a taste of their own medicine. The straight-laced Prefect suddenly finds herself pranking her class's trickiest boys--and maybe even enjoying it. Coupled with a series of mysterious apology letters that Lily has begun receiving, it's bound to be an interesting year.

Winner of the 2010 QSQ for Best Canon Romance!