Code Geass: Lelouch of the Rebellion (R2) (2008)

After the failed Black Rebellion uprising against the Holy Britannian Empire, the Black Knights resistance group is powerless without their leader Zero. Lelouch, who lost his memory of his past as Zero, is living a peaceful life as a high school student. C.C. attempts to jog his memory and convinces him to become Zero again to complete their mission.