Doomsday Girlfriend: My Backyard Leads to Doomsday

Doomsday Girlfriend: My Backyard Leads to Doomsday manga summary:

A ring that can freely travel between the world and the end of the world was picked up by Song Chao. The food of the world is more valuable than gold in the end of the world, and more coincidentally, there is nothing in the end of the world, just more gold! This time Song Chao made a big hit! He took a tomato from his refrigerator and sold it for ten kilograms of gold! You can even exchange food for beautiful women! Do you think you can do whatever you want with food in the last days? Sorry, as long as there is food, it can really do whatever it wants!