Risou no Himo Seikatsu - Volume 7 Chapter 4

Ye Fan accidentally obtained a billion crystal technology system, and since then, he has become out of control.

Android: You do n’t even have a mobile phone system. I want to make it impossible for you all!
Ye Fan: Sorry, I researched it out, it seems to be more powerful than yours!
BMW Benz: Our engines are famous all over the world!
Ye Fan: Sorry, I do n’t have an engine, I only have magnetic levitation, and the speed is only a few times that of yours. Do n’t worry, take your time!
…
Enemy: Is he still human?
Who can stop this!

- Description from Qidian

This novel is also known as From The Start, I Traded A Galactic Warship

After getting a trading platform three thousand years later, everything in the world has become an antique, worth a thousand gold.

But it was also learned that three years later, aliens invaded, human beings fell, and the dark starry era began.

In this era of unprecedented change in tens of thousands of years.

Shen Shi decided.

First trade a space battleship, and then talk about it.

then–

Battleships come to the world from outer space! Global shock! Starry Sky Era, open in advance!

- Description from novelbuddy

When Ares wakes up, he finds himself in a familiar world but in an unfamiliar body. It was a world he'd read about in a novel he discovered among the belongings of his late girlfriend.

But when he ended up in a novel that he had just finished reading before dying, his life changed for the better or the worse.

Why are all women crazy about me? Why are they pursuing me while ignoring the main character?

Join Ares on his journey through the novel to solve the mystery of his death and learn the truth about the world he ended up in.