Even If I'm Reborn as a Cute Dragon Girl, I Will Still Make a Harem - Chapter 175Book 5: : Dream (6)

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

- Description from Novelupdates

In this school fantasy story set in the distant future, creatures contaminated by pollution have overtaken the land, forcing humanity to live in isolated mobile cities called Regios. One such city named Zuellni is a self-contained school in which freshman Layfon Alseif has just enrolled. Layfon reluctantly joins the 17th Military Arts Platoon led by the third-year student Nina Antalk and embarks on a series of adventures.

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

The interview begins:“Boss Gu, what is your view on pursuing women?”“The most important thing is loyalty and protection.”The man turned his head to look at the petite woman beside him, his deep-set eyes glowing with utmost affection.“He's obviously cunning and shameless, relentlessly dealing with both friends and in-laws, without any limits...”Shang Xixia's smile was brilliant, but her slightly twitching lips betrayed her silent complaints.“Boss Gu, why did you choose to inherit and manage the Gu Group?”“There are many ways to live life, I want to...”Gu Jingchen's lips curved slightly, exuding a calm elegance.“If I couldn't be at home all the time,”Continuing her inner complaints, Shang Xixia glanced with great grievance at the man beside her....The most beautiful love is when, after growing up, you are still my beloved childhood sweetheart.