There is a virus starting to go around that originated in Japan, but it has little people infected. The virus essentially turns people into cat-people, fox-people, or even wolf-people. The virus also usually changes the victim's gender to woman, rarely man. Here's where you come in, as you are a normal guy/girl living in a cottage on the outskirts of Japan, unknowing that that is the area with the most infections yet. You have yet to find out about this virus, but you will sooner or later.