Manga written by Mangaka Onsen Capybara:
Kinzoku Slime wo Taoshi Makutta Ore ga Kurokou no Ou to Yobareru Made
One day, a large hole opened up in the yard of a house. There was a mysterious slime with a metallic body that was trembling and shaking. For some reason, Yuma Mitaka, a dull high school student, spends his days exterminating the metallic slime that springs up in the hole every morning. As he repeats this daily routine, Yuma's body undergoes an astonishing evolution!
Chapter 11
6 months ago
Action
Fantasy
Slice of Life