After Rebirth, My Fiancé Helps Me Avenge the Wicked Scum - Chapter 3: Treasure

[WSA 2025 Entry]Ivan Mendoza, a world-renowned robotics engineer, met his end at the hands of those who feared his genius. But death was not the end. Awakening in the body of Kael Valtieri, heir to a destitute border territory in the magical kingdom of Ardania, Ivan finds a second chance in an unfamiliar world driven by arcane forces.In this realm, magic reigns supreme, yet it is woefully inefficient and bound by antiquated traditions. Armed with the knowledge of advanced robotics and engineering from his past life, Kael sets out to merge science with sorcery, aiming to revolutionize the very fabric of magic. His quest? To uplift his impoverished territory and safeguard it against the lurking dangers beyond the border.But Kael’s journey takes a thrilling turn when he stumbles upon the remnants of an ancient, forgotten civilization. Hidden within their ruins lies golem technology—astonishing constructs far superior to anything Earth’s science could fathom. Driven by curiosity and ambition, Kael deciphers their secrets, melding ancient ingenuity with his modern intellect to forge unprecedented defenses.As Kael uncovers the dark history of this world, he learns of rifts that once unleashed monstrous beings from other dimensions, nearly annihilating humanity. Though a powerful artifact sealed these rifts, its strength is waning, and an impending cataclysm looms.Now, with time running out and the continent teetering on the brink of another monstrous invasion, Kael must wield his hybrid mastery of science and magic to confront the rising tide of darkness. Can one man, armed with the knowledge of two worlds, avert a catastrophe and carve out a new destiny?Prepare for an epic tale of innovation, mystery, and survival in a world where the past and future collide.

She was the illegitimate daughter of the Gu family from N City, and a gloomy coward in everyone’s eyes.

Just after retiring, Gu Xiyan was entangled by King Qin again.

King Qin looked down on Gu Xiyan, but he was greedy for her body and planned to take her as a concubine.

Gu Xiyan had a smile on her face, MMP in her heart. Becoming a concubine to an ex? It’s a joke, isn’t it good to make money?

I don’t want the peach blossoms to bloom, the second son of Yongcheng Hou and the third son of Qi Anbo all fall in love with her.

Zhou Mu, with [long legs], [buttocks] and [unbelievable appearance], was even more simple and rude, and went straight to the door to ask for marriage.

*

On the day Qin Wang got married, Gu Xiyan also got married in a grand manner.

On this day, there were not a lot of guests in Prince Qin’s Mansion, all the dignitaries in the city went to Zhou Mansion for a wedding, and the emperor condescended to officiate the wedding ceremony for Zhou Mu and Gu Xiyan.

Everyone knows that Zhou Mu is the emperor’s eldest son raised among the people.

Later, Zhou Mu became the emperor, and Gu Xiyan became the queen just by lying flat.

*

Zhou Mu is a man of unrivaled beauty, unique in the world, attracting the hearts of all the girls in the city, but he doesn’t understand amorous feelings, what love is.

Gu Xiyan, who was reborn and returned, knew that Zhou Mu was a non-marriage advocate, and never dared to have unreasonable thoughts about him.

Unexpectedly, on the day when she met with the third son of Qi Anbo, the noble and self-respecting man suddenly went berserk in the street, dragged her into the carriage, and asked her to marry him with red eyes: “My girl’s reputation has been ruined by me, so she can only marry me!”

[Rebirth, Overhead, Double C, Sweet Pet]

- Description from novelbuddy

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?