One Piece: Dream of Immortality - Chapter 16: Reward

Synopsis: 【Era + Rebirth + Educated Youth + Rough Husband's Devotion + Child Rearing】In her previous life, Su Xiaoxiao unwittingly led disaster into her home, resulting in the demise of her entire family through a series of “accidents.”Upon her rebirth, she vowed to make those who had harmed them pay a bitter price!She was determined to love wholeheartedly the vengeful Jiang Yexun, who was willing to squander his vast wealth and even risked his life for her vengeance.But there was a peculiar issue with her body – she couldn’t seem to control it.Whenever she was near Jiang Yexun, an irresistible urge for intimacy took over.Jiang Yexun clenched his teeth and said, “I've given you a chance to run!”Su Xiaoxiao embraced the man's waist and playfully retorted, “Run from what? A real man should act, not just talk!”Jiang Yexun pressed down on the provoking girl, “Alright then, let's act!”After marriage, Su Xiaoxiao, nursing her sore waist that hadn’t straightened since, tearfully recognized one undeniable fact – you must not provoke a rough-and-tough husband like him.

High school student Mikoshiba Ryouma was summoned to a different world in the middle of a war. Sensing the malice from the one who summoned him (a summoner of the O’ltormea empire), he uses his martial arts to run away, killing important people of the empire during his escape. After the escape, he rescues two twin sisters from the hands of thieves. The sisters who can use magic, swear to serve him as subordinates. Thus, Ryouma begins his journey on the path of the supreme ruler.

In the 30th century, Tyler Rustel is an eccentric and visionary genius, renowned as a brilliant inventor. His life, however, comes to an abrupt end when a small experimental nuclear reactor explodes in a series of unforeseen events. Yet, death is not the end for Tyler. He awakens in a body that feels both familiar and foreign—a parallel version of himself in a completely different universe.This is not a world of technological progress or orderly civilization. Here, twisted gods roam the cosmos, shaping realities according to their cruel whims. The moral laws that governed his previous world do not exist. This is a magical universe, one marked by brutal betrayals, interdimensional wars, and endless massacres. The balance between the forces that rule this cosmos is fragile, and Tyler finds himself at the center of schemes involving powerful entities and boundless ambitions.However, Tyler is no longer an ordinary man. Upon awakening in this new world, he discovers that a fragment of his technology has survived with him: an advanced artificial intelligence system capable of analyzing, adapting, and enhancing anything, provided it has the necessary data. From magical weapons and arcane spells to alchemical techniques and enchanted jewelry, everything can be optimized under his supervision.Armed with this technological advantage in a universe dominated by magic, Tyler quickly realizes the potential of his unique position. While others struggle to survive, he schemes to conquer. Driven by his sharp intellect and a questionable sense of morality, Tyler embarks on a ruthless campaign to achieve magical supremacy and subjugate all worlds around him. He seeks neither redemption nor alliances. His ambition is clear: to rule everything and everyone as a tyrant, to amass an immense harem of women, and to father one million children to establish his legacy across all realms.

The first great emperor in the world was betrayed by his confidante and perished. Millions of years later, the great emperor’s soul returned and was reborn as Ye Yan, the son-in-law who was kicked out by the Chu family with a letter of divorce, restarting the supreme journey. Open the gate of immortality, kill the Jiuzhongtian, and cast an invincible name again!

- Description from novelbuddy