Galaxy Domination Guide - Chapter 738 - Original Matter 724

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

Three years ago, to defeat the Demon God who was trying to destroy this world, thirteen Braves were summoned from another world. Each of them had varied ages and gender. Each of them was bestowed with cheat like powers not normal in this world.

“Died by Truck-Kun. Reborn in a whorehouse. Blessed by a demonic system. And now? I'm about to make this entire fantasy world moan my name.”Kael Rennhart was just another overworked salaryman on earth—until fate and uncle-kun gave him a one-way ticket to Virelia, a mystical world of swords and sorcery.Waking up in the body of a broke brothel worker with zero prospects, Kael thought he hit rock bottom… until the Porn Empire System awakened inside him.[System Activated: Welcome, Embodiment of Lust.][Mission: Build the greatest adult entertainment empire in the realm.][Failure Condition: Eternal blue balls.]Now, with Lust Points to farm, kinks to unlock, and a cast of dangerously hot women (and men, and elves, and orcs, and... others) joining his cause, Kael must rise from gutter-level debauchery to become the Lust Overlord of the continent.But power, pleasure, and profit don’t come easy...

Fate, a gatekeeper who had been working for the castle, is beset by a few burdens.