The Future After the Apocalypse

She only came here to find something. She really wasn't trying to become a cleaner! Why are there zombies first, then monsters, and now even the insectoid race, all waiting for her to clean up after them? Is there any pay? She doesn't want to work for free! "Little Meier, don't be naughty! Haven't I already paid you?" A certain man steps closer, grinning with ill intent. But Mei looks at him with a mournful expression and asks timidly, "Could I request a replacement?" "What do you think?" (Volume One: Apocalypse; Volume Two: Beastmen; Volume Three: Interstellar)