The Dungeon Cleaning Life of a Once Genius Hunter

Kim JunWoo the worlds first SSS rank genius hunter
He is an incredible user of ability but his horrible personality leads to problems with his reputation
In the midst of his troubles he was attacked and killed by an unidentified group
And when he opened his eyes he had returned to the past of 10 years ago
Though he tries to become a hunter again and raise his rank his skills were all sealed by the karma of his previous life
In order for that to be released he needs to work as a Dungeon Cleaner which is infamous for being extremely tough in this industry
But this cleaner hes different
Not only monsterstroublesome hunters superiors only taking up positions after theyre hired out of nepotism and even people who will be colleagues with him
Hes making a complete mess to clean everything up
The exhunter who is stronger than the current hunters and his crazy cleaning begins