Sarasa steps into her dead brother's name and the show never flinches from what that costs her, not just the mission, but the person she has to become to survive it. Every character around her wants something from the girl she was; the story is about her refusing to stay that person. Thirteen episodes is criminal, but what's here is Shakespearean tragedy wrapped in a post-apocalyptic revenge narrative, where the real battle isn't against the Red King but against the identity that was supposed to save Japan in the first place.

Twins are born in a small village: a boy named Tatara and a girl named Sarasa. The prophet Nagi proclaims Tatara the chosen one destined to liberate Japan from the oppressive reign of the King and his four sons. When the merciless Red King kills Tatara, Sarasa assumes her brother's name and his duties, setting out to free the land and avenge him. The series mixes adventure, drama, romance and science fiction.