Elf Tensei Kara no Cheat Kenkoku-ki - Chapter 16Book 4: -3: Blast Furnace

In the year 3021 of the Western calendar, the last world war broke out and the earth was destroyed.
A group of survivors left their homes to settle on new planets. New races, new classes are born. Cities began to be built, countries rose one after another, conflicts between different races intensified, and social order was re-established…
The transformation from a survivor to an aggressor was but a moment.
This is a world where the strong are respected and the fittest survive.
Shang Ping was reborn from the earth in the 21st century to this planet. The moment he woke up, his fate had already begun to change.

Content Labels: Strong Soul Conversion Court Marquis Heaven’s Chosen
Search keywords: Protagonist: Shang Ping ┃ Supporting roles: Solan Edrich, Liu Xi, Austin ┃ Others: future time and space, battleship, interstellar war, rebirth, distant starry sky

- Description from novelbuddy

Death, Depression, Poverty, Love issues – all things that a 27-year no-name writer faces.

Luis Hartmann activated the mysterious Portal and began the journey of traveling between two worlds. In Immortal world, there are various immortal cultivators who can destroy mountains and live for thousands of years. In his own world, it is a Western fantasy realm where people can become knights or wizards, with different kinds of races. Luis, using the resources of both worlds, rises through the ranks. The life seed that knights awaken when becoming apprentice knights transforms into spiritual roots in the immortal world. With strategic wisdom, he helped his family become the eternal family, dominating both worlds. [Knight + Martial Arts + Immortal Cultivators + Family building]

Through an accidental transmigration, Gu Huan became the youngest Alpha general in the novel. He is handsome, aloof and powerful, admired by thousands of people.

Even if he was a villain, this was a proper, awe-inspiring character design.

Gu Huan was so happy!

Looking at the needle holes in his arms, the haggard eyes, and the home that had been dismantled into an open-air convertible.

He suspects that he is actually an addict.

Doctor: No, you are just a very ordinary Omega who used inhibitors during the fever period.

Gu Huan: …you are kidding me.

Doctor: An Omega of your age who has not been marked is very likely to be leashed.

Gu Huan: …I believe this.

To survive. Kaolin (senior) Flower (single dog) can only apply for marriage online.

Marriage Self-Description: Older, hot-tempered, not guaranteed to not to beat someone in heat, not guaranteed to not to beat someone to death.

In the end, someone actually came to this painful marriage request, and it was the prince who wanted to eradicate him, the villain, in the original text.

——The so-called wolf dog, when it hates you, it is a wolf, when it likes you, it is a dog.

- Description from Novelupdates