The Misfit of Demon King Academy (WN) - Chapter 8.2

A thousand years ago, the Great Calamity struck Earth. Countless rifts tore through reality, opening portals between the Demon Realm and the Human World. Overrun by monsters, humanity was on the brink of extinction. But at its darkest hour, something miraculous happened—those who died returned, awakening strange new powers that allowed them to fight back.Vale knew that story well. Maybe that's why he wasn't surprised when he heard the voice of the system speak to him.[ Congratulations! You have died. ][ Your First Trial of Death begins now. ]What truly shocked him, however, was the question burning in his mind:“Who would dare to assassinate the Second Prince of Verythmia?”

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.”

[Ding!] [The Milf Hunting System is online] [Seducing and conquering older women would be made possible with this system] [Isn’t that exciting host?] This was the notification Jay received after dying and transmigrating into the body of a 17-year-old boy named Ryan. He considered life to be meaningless and boring while he was still on earth. Then he died in an unexpected way after getting hit by a truck. Thinking that was his end, he was completely wrong. After meeting with a certain god, he got transmigrated into a world where powers, magical beasts, and so on exist. But things would be different in this world, life wouldn’t be that boring anymore because he has a task now...seducing and conquering milfs. Armed with the milf hunting system, he’d be able to conquer a lot of milfs, benefit from conquering them, and become stronger in the process. Follow him through his journey...