Amelia Thornheart - Chapter Sixty-Four: Discovered

Going for a swim, she ends up in an ancient wild Beast World and ends up being brought home by a handsome wolf.
She wants to stick to the handsome wolf, stock some salt, farm some land, look at some handsome men and grow old like that, but the handsome wolf pounces on her every day.
What? He wants her to have babies?
NO~ NO~ NO~ There is no happy ending to interspecies marriages, hurry and let go of me handsome wolf~

- Description from Novelupdates

In a world where dungeons are worshipped as divine trials and the System is hailed as a blessing, Beno Mark knows only one truth—everything is a lie.Haunted by the sin of killing his own parents, burdened by guilt, and shattered by the disappearance of his younger brother Renzo Mark in a mysterious Violet Gate, Beno spirals into madness, questioning reality itself. The System, which promises power and salvation, is nothing but a trap, binding the souls of countless hunters. The world itself is not as it seems—vast beyond imagination, hiding secrets that even the gods fear.Yet, Beno refuses to crumble. Driven by obsession and guilt, he awakens the cursed King System, the most forbidden and dominating force ever sealed. As fragments of truth and ancient conspiracies emerge, Beno, alongside Luna, Charles, Raul, and Isabella, begins to unravel the world's true history—a truth that has been hidden for centuries.What is the Violet Gate? Who controls the System? And why was Beno chosen as the vessel of the King of All Beings?The path is clear.Kneel... or Bleed.

Evolution, it is the process with which the most fit for survival pass down their winning traits. What if this could be done on one animal, one object, one person, what traits would evolve.

...

Humanity has been entered into the grand inter-realm competition for sovereignty of all realms.

Darwin has been granted the gift of evolution

[Slow Burn]

Died as a virgin. Reincarnated with a big rod.

Ding!

[You have acquired the Bad Luck system. The God of death sympathized with you for dying pathetically. You have been gifted with a divine rod. Your meat rod is the tool you would use to rise to the top. Grow faster and stronger to conquer all the beauties and face the tribulations of the world]

“Eh, where am I? What! A Bad Luck system!” Trying to comprehend what had just occurred as strange characters appeared in his view. Vincent tried to talk and move his body but he realized that he was In the body of a baby.

Vincent Oswald, a popular hentai writer and tentacles creator died as a virgin in a tragic accident and reincarnated into another world.

A dog-eat-dog world, a world of cruelness, a world where you could have your head rolling for a plate of meat soup.

Let's see how Vincent survives in this cruel world and strives for the top as a boy that was born with a silver spoon.

Elves + Demons + Vampires + Yandere + Op characters and so many fantasizing things.

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Note: No NTR towards Mc.

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The MC acts naive and annoying in the early 30s chapters. After that, I can guarantee you a lustful, action-packed piece of work...