Gathering (solo leveling & windbreaker crossover)

About 500 years ago, a strange portal suddenly appeared out of nowhere blocking the roads on the streets of Seoul. Inside the portal then would emerge a lot of strange looking creatures and monsters which would then attack the nearby civilians. The ones who could fend off these types of monsters are called "hunters", many guilds have established to form these "hunters" in groups which are ranked from E rank to S rank hunters. And so, generations have passed and these portals kept on appearing over and over again at a random time that no mortals could predict. These portals don't just appear in Korea, they appear everywhere around the world. Please note that the images that I used for the cover is from Pinterest all credits goes to the creator.