Four days ago, people collapsing with a high fever of an unknown cause began appearing one after another in Ancadi. It was really a sudden, with 3,000 people out of 270,000 falling unconscious in the first day, and those with similar symptoms reached 20,000 people. The medical center filled instantly, and it continued to fill up the communal center. The medical personnels were treating the patients while looking for the cause of the disease, but, just like Kaori, they could only delay it without curing any.