Prologue

Far into the future, a sudden disaster has befallen the earth. A sudden virus suddenly broke out and caused many of the population to turn into bloodthirsty and demon like monsters.
These monsters are called 'RASETSU'....

Hijikata Toshizo, Yukimura Chizuru, Kazama Chikage, Shiranui Kyo, Amagiri Kyuju, and Nagumo Kaoru suddenly finds themselves in the future.

Not long, they were soon saved by a a stranger young lady and they will soon embark on a journey to uncover the truth of the Rasetsu experiments and they mastermind behind the disaster.