How Does The Protagonist Level Up In 'The Lust System'?

I’m the heroine in an erotic story. My specialty? Turning anything hot or cold into something steamy. On the first day I landed in a horror game, the boss told everyone to choose how they wanted to die. I smiled and said, “I’ll take shortness of breath, trembling legs, glazed eyes, and… pleasure so intense I die from it.” Boss: “???”

When the apocalypse came, she lost everything. Starving, hunted, and desperate, she trusted the one man she loved… only for him to betray her in the cruelest way possible. He stole her last supplies to please another woman and left her to die in a sea of the undead. But death wasn’t the end. She woke up days before the world collapsed. After cutting ties with her ungrateful ex and his parasitic family, a mysterious voice awakens in her mind, LUS, a Level-Up System designed to help her survive the coming end. With knowledge of the future and a system guiding her every move, she begins to prepare. She stockpiles resources, builds a base, and learns how to fight back against the horrors that once destroyed her. And when the apocalypse arrives again… she’s ready. But survival isn’t the only thing waiting for her in this new life. A silent killer who watches her like prey. A manipulative genius who wants to unravel her secrets. A gentle protector who sees the girl she hides. And a dangerous man who thrives in chaos. As the world burns and power shifts, they’re all drawn to her, each with their own motives, each with their own darkness. Even her past refuses to stay buried. Because now, the man who once abandoned her is back, broken, desperate, and begging for a second chance. Too bad she has no time for regrets. Not when she’s busy rising to power… and building a kingdom in the ruins of the world.

Left for dead by the man she loved. Reborn with a system built for absolute domination. When the zombie apocalypse hit, Eva’s pathetic boyfriend stole her last scraps of food and fuel to please his mistress, leaving her to be ripped apart by a ravenous horde. But instead of dying, Eva wakes up thirty days before the outbreak, and this time, she’s not playing the victim. With her memories of the future and "LUS" a ruthless Level-Up System echoing in her head—Eva ditches her toxic ex, hoards a fortress of supplies, and builds an unstoppable wasteland empire. Now, her sniveling ex is back on his knees, weeping and begging for forgiveness. But Eva doesn’t have time for a coward. She has a base to expand, a system to max out, and a line of dangerously powerful, fiercely protective alpha "partners" begging for her attention—starting with Justin, the lethal wasteland warlord who refuses to let her go. The world ended once. This time, it belongs to her.

In a world with machines and angels, the main character has to become the strongest to avoid getting killed and discarded.

Sandara is a world filled with magical beings, in this world, everyone will be given a system when they turned 18. Before the people in the Sandara world turned 18, they put their effort into improving their physical features. Alex was born into a poor family. His father and mother died when he was little. This year Alex will turn 18 and receive a system. till now he lived in a forest outside the white pearl city. He was thrown out of the city because he offended a rich and powerful person. from then on he is living in the forest. . . . on his 18th birthday, Alex got a system that will help him to get stronger. but to get stronger he has to conquer the woman's hearts. with each woman he conquered his power level will increase. > Let us witness the journey of a young man who will become the strongest in the world. . . . . I hope you will like my story :) Note: The cover pic is not mine, credit goes to the creator, I will gladly remove it if the creator asks me. No One 17 and Under Admitted

When the zombie apocalypse begins, Audrey's boyfriend leaves her behind to die. He chooses the prettier girl. The easier choice. He doesn't know Audrey will wake up forty-five hours in the past with one impossible advantage. LUS. A mysterious Level-Up System that measures life like an accountant measures profit. Every choice is an investment. Every mistake becomes a liability. Every mission offers power... if she survives long enough to collect it. This time, Audrey refuses to waste another second on people who never valued her. As the world collapses, Audrey builds more than a fortress. Every mission brings new power... and another dangerously capable man whose fate becomes tied to hers. Among them is Ronan, a quiet survivor who seems strangely familiar, as though he's carrying memories that don't belong to this lifetime. The more Audrey grows stronger, the more dangerous the truth becomes. Not everyone earned a second chance... and someone else may be playing the same game. Her ex will regret abandoning her. The dead will keep coming. And the only rule that matters is simple: Level up... or die.