Code Geass: Dakkan no Roze S01

The seventh year of the Kowa era, in the former Hokkaido block occupied by the New British Empire, mercenary brothers known as the "Nameless Mercenaries" live. The older brother, Ash, has high athletic ability and skill in controlling Nightmare Frames, while the younger brother, Rose, is an intellectual who oversees gathering information and devising strategies. Due to the existence of the impenetrable energy walls known as the "Stump Towers", the 100th King was able to stop the Black Knights' plan for liberation, and Calis al Britain has been trying to plunge the world into chaos once again with the help of her servants, Norland, and the Knights of Ainberg, for four years. After receiving a request, Rose and Ash, along with the Seven Stars Resistance Group, are trying to rescue Princess Sakuya and confront the Empire.