Kamiwazumi Jun is a high school student down on his luck. One day, he finds a girl fainted and stark naked in front of his house, who later explains she is on a mission from the future to protect him, the eventual saviour of humankind. With the help of tools from her 'ninth-dimensional pocket,' Jun's life is about to take a turn for better or worse as he entrusts his daily life into the hands of this mysterious girl...

Sequel to Blade of the Immortal. It is set in the Bakumatsu period in the 19th century, and follows the main character Manji, who starts the story in a life of seclusion in the Tosa domain, but heads to the capital for a certain reason. The story will have him confronting the strongest warriors of the time.