It was Year 20XX, and Zombies (known as Zoms) had been killing off and eating most of Japan's population. These creatures started to take over the world, an unknown virus spreading throughout all of Asia, and soon it would reach other continents. Most of your family and friends either fleed the country or had failed to escape these zombies. There was nobody for you to rely on — you were all alone. But not for long.

"Excuse me, I'm looking for my arm," a random voice calls out. A zombie.