Oberhaupt - Monsters Hierarchy

In 2029, a virus designated Tokbog-29 spread globally, originating from Russia and within two years, the virus claimed over 800,000 lives. By 2037, the death toll had reached 760,000,000.

In 2038, in Japan, a creature, codename Chimera, was the first of many entities to emerge from infected patients referred to as Ijo (Japanese for "Anomaly") or Zmij (Russian for "Dragon").

The year 2038 marked the beginning of the Anomalous War, which lasted until 2047. The conflict was fought by the United Nations Armament and Defense Forces (UNADF), particularly through its specialized branch, the Ijo Counterattack Protocol (ICP), known in Russia and Europe as the Zmij Extermination Division (ZED).

In 2047, the Class-Y Human Containment Space Station, also known as Remnant, was launched from the Moon and positioned beyond lunar orbit. It carried more than half of humanity - the last surviving civilian population of humanity.

Only the military remained on Earth.

In 2049, military experiments subjected human test subjects to a modified and controlled substance found inside the Tokbog-29 bacteria.

The substance was designated Tokbog-29β, also known as Nectar. Under extreme psychological stress - fear, rage, or trauma - it triggered the development of the Hirngeist, a system that altered both the psychological and physical state of the host, granting behavioral traits and combat capabilities approximately fifty percent comparable to an Ijo.

Soldiers implanted with Nectar can activate it for a maximum duration of one minute - just enough to finish an engagement.

Each military base fields three squads of four soldiers. Together, these squads form an Oberhaupt, the command unit responsible for their coordination, composed of personnel ranging from seventeen to forty years of age.

The story takes place in 2054. The protagonists have been members of an Oberhaupt unit for at least two years.