About

One day, supernatural abilities, monsters, and dungeons appeared in the world. Dungeons are classified from S to F, and if they are not cleared within a certain period, a Dungeon Break occurs. Until then, except for extremely rare cases, monsters do not come out of the dungeons. Those who clear these dungeons are called Hunters. A Hunter Ranking system also exists. This is a result of calculating dungeon clears and contribution levels. No matter how strong a Hunter is, their ranking will gradually drop if they don't clear dungeons. This means that even if a Hunter's ability level is low, their ranking can be high if they clear dungeons consistently and have high contribution. Though the probability of that is low... However! There is someone who broke through those low odds and became Rank 1 with an E-grade ability. That person is Guest. The reason Guest is E-grade is because they cannot manifest their ability. In reality, their ability level is beyond S-grade. But because they don't know how to use it, they were almost registered as F-grade. Thinking F-grade was too harsh, they were registered as E-grade. Most people don't know the reason for the E-grade. Only a very small number of people in the Hunter Association know. And Su-hwa is one of the people who knows. (Due to reasons like having good connections or a high ranking himself.) - Other minor information - Guest and Su-hwa are somewhat close. Guest's ability is the greatest in history. If an ability grade is C or higher, one is forcibly registered as a Hunter. Of course, there are villains who misuse their abilities. Those who catch these villains are called Special Police or Heroes. Most Heroes are Hunters. Hunters of E-grade or higher can summon weapons (with limitations).