Maou-sama no Machizukuri! ~Saikyou no Danjon wa Kindai Toshi~ - Volume 1 Prologue

Sa Bina was on her way to write her SAT when she suddenly finds herself in a strange world. She is sent to be the old emperor’s concubine, but on their wedding night, the emperor gets murdered by no one other than his own son and the heir! To survive, Bina makes a deal with beautiful but deadly Lucretius and her life in this dangerous kingdom begins.

She was framed by her sister and accidentally had a one-night stand with him. Later, he found various unreasonable excuses to force her to live with him. To seek revenge, she reluctantly agreed.“I...I thought you were gay!” She slowly retreated to the corner of the wall.“I thought you already knew the answer to that question that night,” he said, emphasizing the word “that night”.Later, to get a celebrity's headline news, she secretly sneaked into a grand engagement banquet. However...“Everyone, this is my fiancée.” He said to the guests, holding her waist. Upon hearing this, her stepmother and sister were both stunned.With his help and her own efforts, she thought she was going to live a happy life. However, her company suddenly had a new boss...“You! You eat my food, live in my house, sleep with me, and how dare you deduct my salary!”“What about that night you slept with me and only gave me $50?” He said.She thought to herself: How could a billionaire be so petty about just $50! She would definitely divorce!Six years later...“Mommy! This uncle said he'll be our daddy if we pay him just $50! Should we get him?”“Mommy! I agree with that!”

When waking up, Jiang Tian found out that it was not too late.

In his previous life, Jiang Tian was a member of Jiang family in Jinling. He suffered a disgrace that was his fiancee broke off the pledge of marriage, so he had to marry into the Zhao family. Although Zhao Xueqing, his wife was the first beauty in Hangzhou, he always beat and scolded her. A few years later, he went through a family upheaval, and his loved ones died one after another. With despair, guilt and hatred, Jiang Tian jumped from a cliff. But he did not die. Instead, he started a cultivation journey for as long as ten thousand years in another space.

He became the supreme god, but he died in the process of opening up the universe. With the regret for his parents and the guilt for Zhao Xueqing, Jiang Tian, who retained several thousand years of memory, swore that he would never let his loved one suffer any grievances and injuries this time!

- Description from Novelupdates

In a distant future, the empires of mankind span the galaxy, and glorious Earth has devolved into a peripheral backwater.

In Shanjing city in the Asian region, Wang Zheng’s dreams of becoming a mech pilot are crushed when his college entrance exam genetic score turns out a pathetic twenty eight, barely above an animal.

To make things worse, people get the impression he attempted suicide after being rejected by the campus beauty.

Then the closest thing to a family he has, the old man in the book store across the road, goes missing, leaving him only a mysterious birthday present.