Kyokutou Jihen

September 1945, Tokyo. A post-war process is underway. It is the extermination of the human weapons created by Unit 731, remnants of the war that must be eliminated.

A young immortal girl, Saika, determined to live and be free, will help the soldier Kankuro Konoe, a former military nurse. The two of them set out to find the scattered human weapons.