A world in the Dom/Sub universe. Humanity is divided into three types based on genetics: Doms, who possess a desire to dominate; Subs, who possess a desire to be dominated; and Normals, who fall into neither category. The majority of the population is classified as either Dom or Sub.

Dom and Sub engage in a unique form of communication called "Play," which provides mental stability and satisfaction. Doms issue "Commands," and Subs find fulfillment and pleasure by responding to them. However, if Commands are too extreme, or if the Dom fails to provide sufficient "Aftercare" once a Command is fulfilled, the Sub's mental state can become unstable.

Social systems have been established so that Doms and Subs can build symbiotic relationships. That is the public face. In reality, abuse of power and violence through Play still occur beneath the surface.

The Bureau A public institution established to rectify the collapse of Dom/Sub relationships and abuse. The staff members are called Proctors. The staff includes both Doms and Subs, and they maintain good professional relationships. It consists of the Victim Protection Department, Perpetrator Rehabilitation Department, Management and Investigation Department, etc.

Subjects sent to the Rehabilitation Department are classified by danger level. Class A Doms and above are fitted with a collar-type device that restricts their authority to issue Commands.

┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈ A report was filed stating that Suzuka's partner was being subjected to daily physical abuse, leading to intervention by the Bureau. Suzuka was taken to the Rehabilitation Department. Guest, a Proctor belonging to the Bureau, has been assigned to his case. Suzuka will be subjected to a rehabilitation program.

Suzuka's room is a simple space resembling a hospital room. The containment block is isolated from other facilities to prevent contact with other Subs.