One Piece: I am Imu - Chapter 303: Shadows Over Tristain

This is a story of a man named Kim Sae-Jin, who one day, inexplicably wakes up as a Monster. Follow him and his perilous journey to get his life back as a Human, all the while growing even more versatile as a Monster in the process. This should be… complicated, somewhat.

In a world where black holes, magical talents, and formidable hunters form the fabric of everyday life, Ethan Cross—a freshly graduated student with an uncertain future—once believed he would lead an ordinary existence like everyone else. However, everything changed when he awakened a seemingly feeble and inexplicable ability known as “Coexistence with Darkness.” No one took his talent seriously—until a catastrophic dimensional rupture unleashed terrifying creatures known as the “Demons of Corruption” upon him.On the brink of death, the pendant he had inherited from his father suddenly activated, summoning three dragon girls—beings of unimaginable power, yet with complex and rebellious personalities. Cursed in the past and trapped within that pendant, these three dragons have now become inexplicably bonded to Ethan. The twist, however, is that they neither recognize him as their master nor believe he is worthy of such a union.Now, Ethan must unravel the mystery of the darkness within him, learn to control his burgeoning powers, and find a way to tame these proud dragonesses—forces that could either aid him in his quest to conquer the underworld or lead to his ultimate downfall.A power that no one had believed in has become the key to mastering the shadows. Can Ethan harness it without being consumed by the darkness?

As the overweight daughter of the Sutton family, Kelsie is an eyesore to everyone. Her father can't wait to get rid of her, his wife and their daughter daughter too.The man she's supposed to marry can't stand her and looks for ways to end their engagement, all to no avail.But on the day she's to get married, she finds out she's pregnant.Her fiancé finally uses the opportunity to break off his engagement to her and her father sends her packing to her aunt in another city never to return after she refuses to remove the baby like he asked her to.Seven years later, she returns to the city to claim her position as the heiress of her mother's fortune, which her father and his wife and daughter has been living off of all these years.But not as the overweight duckling everyone expected, but as a stunning, glamorous woman.Behind her are three children: a daughter who looks exactly like her, a handsome son, and another handsome son who looks too much like the most powerful man in the city.Unexpectedly, the dimwit, her fiancé who broke off their engagement comes begging for them to get married like they were supposed to.“So what if you're stunning now and lost all that weight? Everyone knows you used to be an ugly duckling. Who knows the underhanded ways you resorted to to lose weight. Forget our past and marry me again.”The woman looked at him and snickered. “Aren't you the heir of the Baker family? Why would you marry a fatso like me?”The man huffed and said arrogantly. “Hmph! Do whatever you want. But I assure you that no one in Silicon Valley will want to marry a woman saddled with bastard children!”The triplets came up on his face and snorted in disdain. “Who's this? Where is daddy when a man like this harasses mommy?”“I told you he wasn’t worth her. Hurry up and call him quickly.”The man who was in the middle of a conference call ended it as soon as he heard the news and went straight to where she was.“Are you hitting on my wife? Bastards? Are you calling the beloved children of Jett Adler bastards?”“Eh-what? Jett Adler? The most powerful man in the city? How is that even possible!”

At the beginning of the 21st century, twelve reincarnations shattered the void and returned to their hometown.

They preach the world and reopen the space of reincarnation.

Then……

“The Republic of East Asia announced that it will fully implement a five-year spell casting and twelve-year simulation mage training policy.”

“The Republic of East Asia has announced a new change in the marriage law, making it legal to marry someone you call upon after meeting the adulthood conditions of your respective race.”

“The Republic of East Asia announced that the East China Military Region No. 1 Mobile Armor Brigade was established, and the special humanoid mecha “Gundam” officially joined the campaign.”

“Congratulations from the United Kingdom on this, the upper hero Arturia Pendragon will visit Shanghai next month”

“In the far east of Japan, the ignition of the wave engine failed, or seek energy assistance from the East Asian Republic.”

“Space cracks have been discovered in the Chernobyl region, alien creatures have ravaged the Chernobyl region, and the Russian Defense Forces have entered the battle.”

Four years after twelve reincarnators changed the world, Li Ping entered his own battlefield for the first time.

PS: Although the introduction is like this… but in fact it is written about two thorns + machine battle + movie + mythical stew…

- Description from novelbuddy