For Bea, the Manic Pixie Dream Girl, that quirky adorable ray of sunshine sent to make a man's life better, was just a trope . . . until one (named Toile) flitted into her homeroom in a granny cardigan and affected French accent and stole her boyfriend, Jesse. But never fear: math genius Bea devises "the formula," a foolproof (and mathematically proven) route to high-school popularity, which propels her bullied friends Spencer and Gabe to the top of the hierarchy and turns Bea into Trixie.