Sierra Livingston's got it bad for her sister's best friend, Levi Mason-the boy who carries his drumsticks in his pocket, marches with the school's band, and taps his feet to whatever beat runs through his head. Sierra racks her brain for ways to impress the sexy drummer, but nothing seems to be working. When Sierra gets paired with Levi's sister, Brea, for a mentorship program, they strike a deal. In exchange for Sierra keeping her mouth shut about...