MTL - They Regretted it After Their Hearts Turned to Ashes - Chapter 66 for example

[WELCOME TO THE VILLAINOUS LUST SYSTEM] [YOU HAVE 0 LUST POINTS] [YOUR FIRST VILLAIN MISSION IS…] Bo is a lowlife who has an accident as he rushes out of the apartment of the married woman he’s screwing (her husband came back) He wakes up as a farmboy named Levi in the villainous lust system, a platform that promises to make him stronger if he can be a degenerate. Now by performing sexual acts, he can increase his strength and become the greatest ever mage! Yes, this book contains what you think it does, you dirty pervert. in fact it contains plenty of it (it’s a lust system after all)

Upon transmigrating, she immediately faces a disastrous flood, and then has to deal with a marriage swap to an old man who is both slovenly and hunchbacked?Someone: My wife, truly majestic and dominant!PS: This story includes a space with a bit of fantasy, and there's only the heroine who is reborn through transmigration.

The eldest daughter of Hou Di of Anding, who fled for her life, was concussed by someone slapped with a brick. When she woke up, she became the young daughter-in-law of a farm family.

There are many crises outside, and I am afraid that my life will not be guaranteed. Xi Yao feels that the vest cannot be dropped, nor can it be dropped in death…

In order not to be driven away, Xi Yao, who worked hard, accidentally became the group pet of the Zhou family, and everyone protected her.

Zhou Rong, who had never seen a bride since he was a child, was blackmailed by his father-in-law. He even exploited the money to take the exam. He married a sick wife. OK, absolutely impossible.

In order to express his position, Zhou Rong spoke coldly and ruthlessly, and then found that his little daughter-in-law treated the family’s milk baby better than him…

He thinks that his daughter-in-law is very good, and thinks that he can still work hard…

- Description from novelbuddy

Birth rates are decreasing. Hope is vanishing. The world has gone gray.Humanity, drifting in quiet collapse, receives an email.Every person on Earth. Simultaneously.The Aegis Mandate.Disguised as a cosmic aptitude test, it triggers The Incident of Separation—a global psychic cataclysm that erases identities, wipes memories, and divides all survivors into three factions: Law, Neutral, and Chaos. Overnight, cities become battlegrounds. Apartments become dungeons. Ordinary people become monsters—or the ones who hunt them.Ragnar Vhagar was just a loner university student. Now, thanks to a system he didn’t ask for, he’s a newly minted Demon King, locked in a crumbling apartment with goblins under his sofa and a glowing soul crystal next to his frozen peas. His new job? Build a deadly domain, defend it from invading “Heroes,” and somehow level up fast enough to not die.Alongside him is Isabelle Thorne, a razor-sharp warrior of few words and one very sharp sword. Their reluctant alliance, born in blood and snark, evolves into trust—and maybe something dangerously close to affection—as they rise together through the layers of the game-like world they’re trapped in.With each conquered domain and defeated boss, Ragnar realizes the truth: the dungeons aren’t meant to crown a winner. They’re meant to break the players. The Law faction wants control. The Chaos faction craves destruction. But Ragnar? He wants something they’re all too afraid to say out loud:Freedom.In the ruins of Kanta’s ogre stronghold, Ragnar and his misfit warband take their biggest step yet—claiming a kingdom, unifying a fractured system, and preparing for what comes next. The Heroes are watching. The gods are stirring. The world is watching a war.And somewhere deep beneath it all... Ragnar is rewriting the rules.