Diligently Farming in the Apocalypse

Liang Yu had spent long enough drifting around. He returned to his hometown, planning to enjoy a leisurely life. The apocalypse arrived without warning. There were no zombie plagues like in movies and novels, but mutated plants and animals, combined with extreme weather, dealt humanity a devastating blow. The world's population plummeted, and cities were ravaged... Having narrowly survived, Liang Yu gave it some thought with his still-recovering brain. Since the world wasn't going back to normal anytime soon, he would enjoy his remaining time before his life came to an end. A good life needs good food, so he tried farming. He needed entertainment, too, so he started tinkering with games. And since he was lonely, he decided to get a pet... But could someone tell him why he still hadn't kicked the bucket, even after doing all this to build a wonderful life (and practically courting death)? A farming-skilled-to-the-max (not really) bottom X an overpowered top