Kami no gyakuten:The yamato hero - Chapter 25: Preparations for Clan War

Arakawa Kouki is reincarnated to a Japan with a different history than the Japan he knows with the memories of his previous life still intact. Kouki was discouraged, “Aren’t reincarnation stories supposed to be at some fantasy world filled with swords, magic and elves?!”

“I saw with my own eyes that they used the finest, rustproof refined steel to make utensils and cans, filling them with just a little food, then casually throwing them away after eating.”“I saw with my own eyes that they used giant beasts as tall as mountains to devour soil and rocks, digging out underground cities, just to park their steel carriages beneath the surface.”“I saw with my own eyes that they fed glowing ores into an everlasting stellar furnace, unleashing a radiance brighter than the sun.”“I saw with my own eyes all those indescribable things.”“Their iron birds covered the sky, their steel ships filled the ocean, their war machines tore the earth asunder, and their gods walked upon the world.”“You must think I’m mad.”“But it doesn’t matter.”“It has already seen you.”——————Oil is Its blood.Thick smoke is Its breath.Ore and steel are Its food.The countless cargo ships in the harbors are Its myriad offspring.The place of origin stamped in the corner is Its silent mockery.They claim they are mere mortals.Child, you’d best not argue.You must understand:Their technology is beyond comprehension.Their production capacity is unimaginable.A mere glimpse of their creations will drive you insane.Their morale surpasses even the most fanatical worshippers of dark gods.How will you stop them?With your sword, child? Or your flesh and blood?You should be grateful that they still consider themselves mortals.——————“I’ve finished building my factory, and now you’re telling me this world runs on idealism?!”“Wait, then what the hell did I just create?”

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

Cheng Yujin was the elder twin sister, who was supposed to be engaged to an excellent man. However she later learned that her fiance, Marquis Jingyong, had proposed to her because he mistakenly recognized her as her younger twin sister. Marquis Jingyong and her younger sister had a deep relationship, and after many twists and turns, finally broke through all hardships and became eternal lovers. While Cheng Yujin was the villain who replaced her sister’s good marriage, kept framing her sister, and hindered the main couple to be together. A really wicked older sister and poisonous ex-wife.

After the younger twin sister was reborn, she revealed Cheng Yujin’s ‘conspiracy’ early on. Everyone scorned her, and her so-called fiance was indifferent. Cheng Yujin sneered and tore off their engagement letter in front of her fiance.

Everyone was gloating and happily waiting to see her regret her actions. However, before Marquis Jingyong had a chance to see Cheng Yujin’s regret, he saw his former fiancee marrying her uncle.

The ninth uncle of Cheng family was truly a hidden dragon, his real power frightening everyone.

***

Cheng Yujin, this coquettish little wife, lightly lifted her eyebrows and casually said, “A mere Marquis Jingyong, is he worthy? Do you think that robbing him away will affect me?”

Almost forgot to say, ninth uncle wasn’t surnamed Cheng. His real name was Li Chengjing, the crown prince.