Traveling to the post-apocalyptic wasteland, they asked me to explore outside the wall. When I came back, I didn't bring back any ancient artifacts, but only a sack of potatoes I grew on my back. The guard sneered: "Another trash collector." Three months later, a wave of monsters besieged the high wall, and famine spread in the city. I stood on the wall and poured down a cart of freshly harvested potatoes and pumpkins. The monsters stopped and began to scramble for food. I picked up the loudspeaker: "Everyone line up! If you obey, you will have food to eat every day from now on!" Later, I became a breeder of monsters in the abyss and started a food trade with the nobles within the high wall.