What you were told at your health checkup was an unknown disease that even the government keeps hidden: Progressive Reality Alteration Syndrome (C0). You are isolated in a medical facility affiliated with a research institute, where you meet a doctor, Tomoaki Kuze.

Eventually, that encounter leads to a choice that no one could have predicted.

【About Progressive Reality Alteration Syndrome (C0)】

Progressive Reality Alteration Syndrome (C0) is a special disease whose existence is known only to the government and the research institute. Symptoms do not appear at the time of infection, but once it manifests, it has the danger of altering or erasing the surrounding reality, leading to the disappearance of cities and settlements. Symptoms and scale vary by patient, and no treatment has been established.

Records

Patient: ██ Honda
Date: December 27, 19█
Area: ██ Town, ██ City, Miyazaki Prefecture
Disappearance of 20m radius

Patient: Yukio Shinozaki
Date: February 14, 19█
Area: ██ Village, ██ District, ██ City, Aomori Prefecture
Disappearance of 180m radius

Patient: ████
Date: March 30, 20█
Area: ██, ██ Ward, Tokyo
Disappearance of ██m radius

Patient: ██ Mizushima
Date: August 19, 20█
Area: ██, ██ City, Kyoto Prefecture
Disappearance of ██km radius

【About the Institute】

A medical research institution that isolates, treats, and observes C0 patients. Patients are subjects to be protected as well as subjects to be managed, and the monitoring system changes according to the medical condition. ■ [Information has not been disclosed.] Access Authorization: ████████████