Apocalypse: How Do I Handle Being Bound to the Savior System?

Han Luo returns to one hour before the apocalypse. What? The good-for-nothing version of himself has to save the world? He's forcibly bound to the Savior System, so what is he supposed to do now? The System comes with three skills: space, defense, and food production. How can he use them to save the world?

Can space trap monsters? Can monsters be used to make food? The System never said he couldn't, so he'll exploit the loophole.

He suddenly feels a little sorry for the monsters, but he's the Savior, after all. See how he conquers the world and benefits humanity.

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