Seirei-tachi no Rakuen to Risou no Isekai Seikatsu

It's the Golden Week, and Yuuta Morizono (Age 25) can't wait to spend the next 11 days staying home and conquering all of his games and manga. After a trip to the supermarket to stock up on food however, he found himself stranded in a wasteland with no sight of human - how is he going to survive with just the food he just bought?