Barely Lethal (2015)

Sixteen-year-old Roxy, a seasoned assassin, craves the mundane existence of a typical teenager. To escape her lethal life, she orchestrates her own demise and resurfaces as a high school senior in suburbia. But beneath the veneer of normalcy lies a different kind of battlefield. Roxy soon discovers that navigating cliques, crushes, and popularity contests can inflict wounds far deeper than any she’s encountered in her deadly profession. The trials of fitting in prove to be a surprisingly dangerous game, and survival might require more than just killer instincts.