I Wanted A Typical Fantasy Isekai, Not This! - Chapter 14: Birthday Boy…

In the City of Crime, one law stands above them all: Only the strongest can live.

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

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

Aukin was reborn in Lingwu Continent with his past life memories from earth. Lingwu is a place where the strong prey on the weak. And that each life cultivates immortality.Aukin leads his mother the Fairy Moon a Immortal goddess to fall into the path of lust.Warning this book contained very deprave acts, Gangbangs, Sloppy seconds, NTR, Couple swap, swinging, Caundalism and many more read at your risk.BTW the book's cover picture is Aukin's Mom.