Noroware Taishitsu Dakedo, Densetsu no Seijo ga Mikata ni Narimashita

In a world where mysterious Gates suddenly appeared across the globe, monsters run rampant. Hunters with special skills fight endlessly to hold them back. In this chaotic era lives Reigo Kurozato, feared and shunned as Calamity Reigo'. Branded as a bad omen, he's stopped from joining any raids, leaving him with no place in the Hunter world. With no work left to take, he's forced into the lowest of low-ranking jobs, recovering the relics of fallen Hunters. But during one such missionhe unlocks a power he never knew he had. Original Webtoon