S-Rank Devourer: I Eat Everything To Grow Stronger

Mana comes to Earth and changes everything. The world transformed into a new, vibrant one, but with even more danger than before. Dungeons opened, sending monster waves into cities, forcing the world to come together to fight them off until the Slayer Organisation was created. Seen as a Leech, Arthur tried his best in life, supporting his mother and sisters by working for a mining guild after becoming an E Rank Slayer with the Mana Leech Gift. Suffering, alone and hopeless, something comes to him, offers him a partnership that will take him to the top, changing everything.