Kuro to Shiro no Shinfoni (Symphony of Black and White)

During World War 2 humanity discovered the existence of a mysterious artifact, that energy transformed human beings into horrifying, mindless mutants. The nations of the world formed an alliance to defeat the mutants and keep the artifact sealed away.

In the year 2019, the artifact is now on lockdown in a place called the Vault guarded by the Anti-Entropy Defense Force (AEDF) - an organization made to defend against monsters created by Entropy composed of highly trained soldiers and people with abilities from around the world.

Koshiro Kurokawa a normal high school student meets a young Russian transfer student name Theresa Zima, who is also a member of the AEDF, little that he knew their meeting will change his life forever as he is suddenly dragged into a war against an organization called Anarchy that wants to use Entropy to destroy the world.