MTL - The Great Voyage: the Prop Master on the Straw Hat Ship - Chapter 16

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

Tangyuan was an excellent pulmonologist who, after an accidental death, acquired a system.By completing tasks in various fast-travel worlds, she would fulfill virtue and acquire a new life.The system chosen for her was the farming stream system, which included time-traveling through ancient times, the Republican era, apocalypse, modern times, and more.This fulfilled her joy of earning from nothing and also allowed her to enjoy the study of various professions within the fast-travel system.

Xu Zimei found himself reborn, carrying with him all the heaven-shaking cultivation and memories from his previous life.But something was off about the script. Isn’t reincarnation always the protagonist’s theme? However, I was cast as the villain!This is the story of a villain's step-by-step journey to becoming the Demon King.——————————In an era of great strife, where mystical arts resonated!An elder of the True Martial Holy Sect sat at the Willow Bank River Fishing Platform when suddenly he heard the dragon’s roar. Three thousand carps knocked at the gate of life, transforming into the Measureless Golden Dragon, soaring through the firmament, graceful as a startling swan!There were strongmen who measured the heavens and earth with their strides, monks who sat in meditation in temples for three thousand years, achieving sudden enlightenment—auspicious clouds descended, and all laws of magic cheered in chorus.Blood moons darkened the night, rainbows cut through the daylight.There was a swordsman with a wooden sword on his back who, with a turn and a raise of his hand, shattered thousands of miles of rivers and mountains.In the south of the city, a ragged beggar with a broken willow twig dared to assault the Holy Court of a sect that boasted three emperors.

____this story sets in Japan that developed a little different history from yours.

This is how a Japanese Princess relieves her stress of the day by using the latest VRMMORPG, and while playing the villain there, the first town turns into whirlpool of chaos, smashed the underground organization in one hand and went for a coup. It’s literally a playtime diary of a girl who is called as “Genocider-san”, “Roaming Last Boss”, “A different person plays the game”, “Raid Boss”, “Ruthless”, “Calamity”, and such by the players.