MTL - The Troubleshooting Diary at Hogwarts - Chapter 98 August 21 Sunny (below

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

Bought it right away.

A new law has been passed as part of the nation's measures to address the low birthrate.Rude women become livestock.Rebellious women become livestock.Women who commit crimes become livestock.In a world where common sense has been distorted, this is the story of women whose human rights have been erased.