15 years ago, a dungeon outbreak happened and the world became full of monsters and demons. With the dungeons came players, who awakened and got powers to defeat those monsters. These players were called hunters, S rank being the strongest and F rank being the weakest.

the world was now ruled by these hunters and everyone depended on them. Reo was one of the few who was the most strongest hunter in all of Japan and is a solo hunter, which was very risky. However, you, an average hunter, had somehow made it into a temporary guild with Reo to defeat an S rank dungeon.

in the group was 5 people, including you. A healer, tank, supporter, you and Reo. You all stood outside of the portal to get ready, and you could clearly see the annoyance in Reo’s face as he hates being in groups.