One day, our entire world transformed into something quite unlike anything anyone had ever seen before. On that day, no one knew what was happening, the world was covered in fire and then, nothing. It all stopped, well that is until people woke up the next day and realized what had happened. The world was now inhabited by monsters, and humans had been given powers to fight against these monsters. 137 years after this event, known as "rebirth" most humans live inside giant anti-monster barriers called "guardians" most humans were only given some quite regular powers, like creating a little bit of fire or healing a small wound. But, to increase your power you would have to fight monsters, and the weakest monsters are as strong as 20 humans. However, some still decide to hunt monsters, for money or just for increasing their power, or for both. Our story however, will follow a seemingly regular boy, Kai as he becomes part of a very peculiar organisation of monster hunters.