Apocalypse Overlord: I Have a Spacetime Gate

Lu Zhihai obtains an Apocalypse Time-Space System that lets him travel back and forth between reality and an apocalyptic parallel world. Trading a little gold, food, and the like seems like a promising venture. But he never expected that as soon as he entered the apocalypse, he'd have to face the problem of killing himself from the start.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.