Flesh-hungry monsters, appearing as if out of nowhere, burst into the measured life of every person—and of all humanity—in an instant. They attacked everyone, wherever people were, with no chance to seek help. People found themselves in the very situation where their lives depend only on themselves. The appearance of an interface “like in a game” and the magical abilities it grants only force even more questions—questions that still have no answers. One thing is clear: the world will never be the same again!