Toaru Majutsu no Index - Volume 14, Chapter 4: A Collection of Steel that Blocks out the Sky. Cruel_Troopers.

Jannah is a Countess in the Starlian Kingdom. She's known for her achievements in the battlefield, mercilessly ending her enemies and protecting her people.All for the peace and glory of the kingdom.“Run! They're swarming all over the place!”“Just leave! I already got bitten...!”“I can't leave without you!”However, all the blood sheds in the battlefield became useless when an outbreak befell the kingdom.Doom and betrayal hang in the air, following her like the plague.The apocalypse forced her to shed blood once again, under the guise of protecting her loved ones.Although, something happened that wasn't supposed to happen on her second run in life.[Initializing.....][System activated!][System scanning player's status...][Please enter your name:_____]“What is this thing in front of me? This thing didn't appear in my first life!”With chaos going around her, Jannah started her journey with a newfound thing called “system” to protect her people from the zombies.If you're not a fan of the list below then please click away.— Turtle progression.— Gore.— Same-sex relationships.— Questionable life choices (by MC).

In the year 2031, the earth has further advanced in its technological developments. Though there are democracies, republics, and several other systems of governance followed by various countries, there is still one country that adheres to the feudal system—the Arinphiam Empire.The empire is divided into three parts, where the royal family coexists with the central government to control the empire, keeping it as one of the strongest nations on planet Earth.The richest man on this planet belongs to this empire, where noble families still exist, governed by laws specifically made for them by the royal family instead of the central government.Marquess Avendial Croceaus has finally returned to the past, to the year 2031—a year before the tower's arrival—on the date where his downfall began.As he returns to the past, he discovers himself facing the initial setback of his life, where accusations of treason are soon to fall upon him.This world-building novel presents a completely fresh story with new ideas and plots, where the efforts of the main character lead him to become the one who changes his fate as a villain.Content warning: Adult R-18 Chapters without any warning, as they could be part of the story, a slow but well-paced story to provide the detailed idea about the world-building, a weak main character with the debuff of seven curses, making him even cut off from the chances of growth.

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

As his contract-marriage wife, she just wanted to fulfill the mission given by his mother—having a baby. They didn't love each other, so he always used contraception before they got laid. She had been obedient to him, only to find that he had gone too far! He actually didn't care about their child at all! She couldn't stand it anymore, so she handed him the divorce papers and left, noting: “The world is so huge that I can surely find a better man.”Looking down at her, he retorted, “Come on, your purse strings will tighten up first before you find anyone.”