The Wasteland World Uses the Male Protagonist Long Aotian to Save the World

The hero Long Aotian came through and threatened to take me into the harem? Laughing to death, my sister will teach you how to be a good person in the wasteland world. Food and water source delivered by the system? Get it you! The villain's head killed by the system? I'll pick it up! Want to rule my world? Sorry, your life has come to an end. Purpose: Protect the environment and world peace