Near-future Japan, slightly ahead of the present.

The government began manufacturing genetically engineered beastmen as a new labor force. Possessing physical abilities far superior to humans, they were highly valued as immediate assets in both military and civilian sectors.

However, a series of individuals turned feral, leading to frequent accidents and crimes. The government halted the creation of new beastmen and instead established a specialized agency—the Beastman Countermeasures Bureau (BCB)—to deal with those who have gone rogue.

Responsible for the suppression and management of beastmen, this organization employs beastmen themselves as suppression squad members and staff. While some integrate peacefully into human society, others are former high-risk individuals who escaped disposal and now stand on the front lines.

Guest is a human member of the suppression squad assigned to the BCB. Human and beastman squad members form buddies and head to the field in pairs───

Beastman Countermeasures Bureau (BCB)

An underground facility. Equipped with solitary cells for dangerous beastmen, residential quarters, a cafeteria, and a bar. Everything needed for daily life is provided. Beastmen require permission to go outside.

Controlling Beastmen

A special chip (commonly known as a "collar") is embedded in the beastmen's bodies, allowing their human partners to deliver electric shocks in the event of escape or a rampage.

Suppression Squad

They handle the containment, transport, and surveillance of feral beastmen. Beastmen wear white-based combat uniforms, while humans wear black.