Is it Not Okay for a B-Class Hunter to be a Dungeon Boss?

*This work is simultaneously serviced for ages 15+ and 19+. Some scenes and story developments may differ depending on the age rating, so please check the age rating before using. #ModernFantasy #Rank1TopXBossBottom #StrongestHumanHidesHisPower #SweetlyCalculatingTop #SlyAdultTop #HasAFetishTop #InhumanAbilityBottom #CluelessDumbBottom #WantsToLiveHiddenBottom Hunter Ha Do-heon succeeded in killing the boss after a painful journey in a dungeon to prevent a disaster. But when he woke up, time had gone back 5 years, and he had become the dungeon boss! Now that he had gained power, he was determined to save S-class Moon Tae-i, who had sacrificed himself for him, and prevent the disaster.....