There is a dangerous plague capable of infecting everyone, turning them into zombies hungry for human flesh, born of a dangerous and unknown substance, with one of its symptoms being quite peculiar, a small inflammation in one of the eyes.
A young ''Otaku'' about 17 years old, wakes up with a horrible itch in his left eye, causing him to be separated from his best friend in the blink of an eye after being teleported to a strange world quite similar to his own, only that everything seems to be the cause of a huge destruction.
The young man, named “John”, will make his way towards the creatures that stalk the world in order to find her back with the help of the Military Demonic Hunting Force, and discover the supernatural mysteries that lurk in her left eye and the plague that ended it all.