Sakura is the last of the Tengoku family. She had lived in the underground for years, battling for the poor as the vigilante 'The Fox'. When Wall Maria falls, Sakura is reminded of a wish her parents had for her. To find their home country of Japan. Leaving her life of crime behind her, Sakura joins the cadets in hopes of one day travelling outside the walls. However, a dark past that had been creeping behind her finally showed its ugly face, after 50 years of silence. Will Sakura ever make it out the walls and back home? Or will her dreams be put to a bloody end?