Doomsday Supply Station: All My Staff Are Total Tough Nuts

In a world where heroes are worshipped and mutant beasts are feared, I was cast out of the shelter like trash for not being a hero. But by chance, I gained the power to control the life and death of those beasts. So I opened a supply station beyond the walls, making a fortune by selling the crystal cores hidden inside the monsters. While others struggle to survive the apocalypse, I rise to the top—heroes? Even S-rank ones end up working for me.