I'm 90 years old and the system tells me it's time to create harem - Chapter 16: Alternate Dimension

In a world teeming with Titans, Colossals, Gigantic Monsters and Kaiju's, Erian who reincarnated makes his living collecting scraps of low-grade Defective Genetic Serum, realised he transmigrated along with his system.

Follow Erian as he grows to become the strongest Disaster Grade Titan with the help of his Titan System!

~She is a waste daughter from the Su family that couldn’t cultivate. On the day before her wedding, the Third Prince breaks off their engagement in the street. Her own sister replaces her in the marriage to the Third Prince. She became the center of gossiping in the city. In her resentment, she hits herself on the Su Family’s gate, only to become the object of other people’s ghost marriage.

She, Su Zimo, open her eyes to find herself sleeping in a coffin. It’s not to surprising seeing as she put herself here (hit head on gate), but why is there another person lying beside her? And whats more they are wearing red wedding clothes. After taking all this in she almost faints.

~He, is a cursed person with an indescribable status. This curse that has been passed down in his family for centuries is now effecting him.

A mistaken ghost marriage, a battle in business, and a long period of painstaking love, made their fate intertwined.

- Description from Novelupdates

Traveling through the world of One Piece and becoming Luffy’s brother, Monkey D. Summer, he followed the dragon around the revolution since he was a child.

Until the age of sixteen, Xia Xia left the Revolutionary Army, sailed alone on the sea, and recruited partners to form the Smile Pirates, out of control, the young and powerful Xia quickly entered the eyes of the Navy, and issued an invitation letter, making Xia a The youngest Shichibukai ever.

Warring States: After all, I paid the wrong person. I didn’t expect that the most vicious criminal in the world, Monkey D. Long, had his revolutionary ideas from Xia Xia. The most outrageous thing was that Xia Xia turned out to be your grandson, the bastard Karp. Sure enough, the source of all the chaos was you.

Karp: (*￣rǒ￣)

Crane: I didn’t expect such a smart child to be Karp’s grandson. It’s too surprising. Who would have thought that the most peaceful country in the world is actually governed by a revolutionary army. What a great irony, alas! .

Karp: ค(TㅅT)ค, Xiaohe, I’m heartbroken

Akainu: Compared with the pirates, Xia Xia, who has the evil blood of the revolutionary army dragon, is even more difficult to ignore. It must be solved as soon as possible!

Xia Tian: Oh, just rely on you rock dog?

Fly with one punch!

Kaido: Even me, under the iron fist of summer, I have to cowardly, this guy is simply not human.

Summer: It is necessary, but I want to become the existence of One Punch Man in the world of pirates.

Whitebeard: It’s really the back waves of the Yangtze River pushing the front waves. The title of the strongest man in the world has changed hands.

Summer: Hey, low-key, low-key, just a fake name.

(⑅˃◡˂⑅)

- Description from novelbuddy

The Tower of Heaven.An ancient, towering enigma said to grant any wish, unveil any secret, and provide anyone who enters its floors a path to Godhood; it stands as a beacon of both hope and despair.For untold centuries, its immense power has drawn countless seekers, yet none have ever emerged from its depths.This Tower is engraved in the world’s myths as the meeting place of mortals and Gods, a realm where anything was possible. It is a monument to mystery and the pursuit of glory.However, for one man, it represents the last chance for redemption and the key to unraveling his tumultuous past.The Heavenly Emperor, a great ruler from an era long forgotten. was betrayed by those he trusted and died with a heart full of regret and a thirst for vengeance.Only, the end of his life was not the end of his story. Reborn into a new world, he finds himself drawn to the Tower of Heaven, driven by the desire to understand his reincarnation and to reclaim his lost honor.The path ahead is filled with unforeseen twists and hidden depths. Unbeknownst to him, his destiny is interwoven with forces and secrets far beyond his wildest dreams.The advent of the former Heavenly Emperor begins here.And with each step he takes, the Heavens themselves quake in anticipation.