The Playboy and the Prefect

Ariadne Morrigan was never supposed to be sorted into Gryffindor House. She's bright, studious, and the most talented witch in her year, and Gryffindors are just reckless blundering balls of magical testosterone. When McGonagall pairs her with clever, moody, infuriating Sirius Black for a Transfiguration project, Ariadne is sure she'll never get another moment's peace.