Being a Ranker is my Full-time Job

Everything changed in 2021 AD. The world went under drastic changes this year. Many dungeons of different types, sizes and appearances appeared mysteriously all over the world. The atmosphere, the environment everything changed. Monsters would appear in the dungeons and sometimes they would rush out of the dungeons and attack the nearby villages and cities. But all hope isn't lost as one could awaken and become Hunters. So, can the humanity face the new challenges and solve the mystery behind the appearances of these dungeons and guild? You will have to stick to Shiva, a small hunter from a small country, and his journey to find out the harsh reality and to save his world from the unknown dangers lurking behind the whole simulation.