Those Who Like to Plot

"What's a cute Gryffindor like yourself doing defending a slime ball Slytherin like him?" Severus Snape befriends a young Gryffindor that helps him while he is being bullied by the Marauders, initiating an unlikely friendship between the two. Upon hearing about Severus' problems, she decides to help him win the girl of his dreams and bring down James Potter and his friends. Sev/OC.