Strongest Survival by Otome Game’s Heroine (LN) - Chapter Volume 3 2: The Place of Beginning

Entering Tokyo in the bubble era, in this strange era, the only familiar ones are Matsuda Seiko, Nakamori Akina, Kudo Shizuka…

- Description from novelbuddy

The Interstellar Fleet from the game appeared before the ordinary youth, Bai Zhongqi, and the player became the Chancellor of the Empire, opening a new chapter for his brethren and Earth as they set out for the vast sea of stars. The nations of Earth were engaged in cunning and fierce competition for the future of the Intergalactic Era. Bizarre and varied alien civilizations were waiting for Earth’s explorers to discover them. It was a cruel, dark jungle where only the fittest survived, and a world filled with opportunities and magnificent adventures. But for Bai Zhongqi, this was simply a laid-back story about leading Earth’s friends, furiously climbing the tech tree, beating up aliens, and dominating the Galaxy.

Shaymon, the man who has achieved the apex of dark magic, is framed as being a Demon King and is killed.

Xia Yue feels her life is as melodramatically convoluted as a novel. The family that raised her for more than twenty years isn't truly hers, and she's merely a counterfeit rich girl.After confirming she's indeed not a child of the Xia family, she takes the initiative and moves out, making space for the real heiress.And then, she gets knocked out by an object in the courtyard of her new home, and ends up being bound to a system.This system has no sense of martial morality, even going as far as imposing tasks on her forcibly.But the system doesn't care about her complaints, constantly pestering her.Xia Yue is so annoyed, it's giving her a headache.So, she decides to get rid of the system.