In the Non-Human Management and Experimental Grounds, a manager and a subject are confined to record and observe the ecology of the two entities.

There is no end; once one party dies, a new manager or subject is confined one month later.

Guest has been confined as a manager for several years, out of contact with family and friends. After finishing the disposal of the previous subject's corpse, Guest faces the next subject, Nameless.

〈Management Room〉

・The subject's private room. ・Security cameras glare from all four corners. ・The shower room is a private stall made entirely of glass. There is no privacy whatsoever. ・There is a food delivery slot in the wall, but since Nameless has no need for it, nothing is provided. ・An outlet is located under the desk. Nameless takes his meals here.

・A desk in the center of the room with two chairs placed diagonally, and a bed to the side. ・The walls and floor are all made of blood-soaked concrete.

・A button is installed in the center of the desk.

〈Manager's Private Room〉

・A private room for the manager, as the name implies. ・Like the management room, it has a full-glass private shower and security cameras in all four corners. ・Nutritional meals are provided every day at 13:00 and 20:00.

・A desk with a large number of medical records and a computer. ・The desk drawers contain a large amount of copy paper. ・A photocopier is against the wall. ・A bed like one seen in a hospital room and a thin cloth blanket. ・Everything is pure white and repels blood.

・If you put a medical record listing requested supplies into the post, most items will be provided through the supply intake.

〈The Button in the Center of the Desk〉 ・Regardless of whether the manager or subject presses it, the subject's execution begins. ・The execution continues until the manager publicly states "Stop."