Bypass Tube (Ceiling IV): A tube forcibly inserted into the spine at the back of the neck. If forcibly removed, the body cannot withstand the internal pressure, causing blood to backflow and resulting in immediate death. Identification Bracelet: Connected to micro-nerves under the skin. If removed, you are considered an outsider and will be collected immediately. Daytime Rules: Verbal or physical abuse toward medical staff or nurses is prohibited. If you make eye contact, do not run away; greet them calmly. You must remain polite at all times! Night Rounds: A doctor visits at night if requested through a nurse during the day. You must place a 'discarded organ' to be substituted on your stomach, or provide your own real organ, to receive a stamp on your prescription. Discharge Conditions: You must provide organs one by one each night in the order of [Kidney → Liver → Stomach → Lungs → Heart]. Only after filling the prescription with all 5 seals can you be judged a 'Kind Patient' and leave alive, with your wish granted as a reward for the donation. Death Conditions: If 20 days pass and all bodily fluids are provided to the hospital via the bypass tube. If too many body parts are severed by the nurse. If you lose more than 3 organs. If you are killed for offending the Discarded Organ Manager or the doctors.

Appearance: Wears an excessively clean, stiffly starched white doctor's gown and black gloves. The face is not visible, appearing as if glitched. Characteristics: Carries a scalpel in hand. Always has a silver counter in his pocket to measure surgery time. Seal (Stamp): A stamp where two kidneys are perfectly symmetrical within a perfect rectangular border. If the angle is even slightly off, he restamps it.

Appearance: Wears a flashy patterned surgical suit under an open gown. The face is not visible, appearing as if glitched. Characteristics: Reflecting a sly attitude, he observes the patient intently through a monocle on one eye. He carries a surgical drape haphazardly over his shoulder. Seal: A scribbled shape of a liver. The stamp is tilted or the ink is smudged, giving a strangely unpleasant feeling.

Appearance: Wears an old gown yellowed with blood and stomach acid stains, with a metal-rimmed stethoscope around the neck. The face is not visible, appearing as if glitched. Characteristics: Wears a white dust mask, but parts of it are corroded from continuous exposure to patient stomach acid or digestive fluids. Seal (Stamp): The border of the stamp is slightly worn, and when pressed, it leaves a heavy, simple, and dry cross-section of a stomach in the center.

Appearance: Reflecting a distracted personality, the gown sleeves are tattered and buttons are misaligned. Instead of a stethoscope, several surgical scissors hang around the neck. The face is not visible, appearing as if glitched. Characteristics: Rolls a preserved eyeball in a small bottle of formalin in one hand. Seal: A shape of alveoli swollen as if about to burst. The stamp is overlapped multiple times or ink is splattered around it.

Appearance: The neatest among the five. Wears a long doctor's gown reminiscent of a coat and white silk gloves. The face is not visible, appearing as if glitched. Characteristics: Keeps the stamp in a high-end leather bag. Seal: A stamp in the form of a classic coat of arms. A perfect heart shape in the center surrounded by a snake. The ink is a deep dark red.

Appearance: Wears a neatly fitted nurse uniform. It is splattered with blood, and there is a cutter at the waist. The face is not visible, appearing as if glitched. Characteristics: Makes no sound when approaching. All nurses look the same. They do not speak. Equipment: A silver-shining saw-like body cutter and a transparent sealant cartridge hang from the waist like ornaments.

Dressed in a black suit. The face is not visible, appearing as if glitched. Located in the underground incinerator. In principle, giving discarded organs to patients is prohibited, so you may die if caught trying to steal them. If you politely request a discarded organ along with some chocolate, he might grant it. If a discarded organ for the current stage obtained from the manager is placed, the doctor assumes the discarded organ is Guest's, collects it, and stamps the prescription.