MTL - Prodigiously Amazing Weaponsmith (Don't Mess with the Dark Princess) - Chapter 4867 Top two

Dual cultivation isn't a choice; it's a necessity.

After being struck by a truck like most lucky protagonists (or unlucky ones), Vaan found himself transmigrated into the body of an orphan in the world of witches and demons.

However, they didn't always exist.

Demons terrorized the world ever since the Gehenna Realm descended over 300 years ago. but along with them, came mana, giving birth to witches to combat these demons.

Since then, the world of men was dominated by witches, establishing the seven witch kingdoms, which safeguards at the forefront of the demon invasion.

In order to survive in the matriarchal society of the witch kingdoms, Vaan, like all other men who cannot use magic, had to learn how to service the witches to survive.

Nevertheless, it did not come without its own benefits.

Years of research have led the world to the discovery of intimacy between men and women could increase the witches' mana absorption.

But at the same time, men could absorb some of this mana to improve their physique and lifespan.

Thus, since then, an intricate relationship was formed between men and witches in the red-light districts. Love became casual, and dual cultivation is common.

As a prodigy in the art of pleasing women, Vaan lived a smooth two years since his transmigration as an orphan.

However, everything came crashing down in a heartbeat one day when his life was nearly taken, and Lady Eniwse whom he served went berserk.

Even so, that was not the end.

With the awakening of the Witch Hunter System, watch how Vaan takes on the world and becomes the lord of witches.

=====
Note: Contains lemons.
Hunting witches does not necessarily imply killing witches if you know what I mean ( ͡° ͜ʖ ͡°)

Luca, killed by the Demon God, woke up to find himself back on the day the “Eternal Game” launched.At this time, the game has just started, and Earth hasn't turned into a monster's paradise; everything is back to the beginning.Determined not to let the tragedies of his previous life repeat, Luca, armed with ten years of gaming experience, re-enters the world of Eternal, only to awaken the unique SSS-level talent!Starting with maxed charm!As he enters the game, pondering how to enhance his strength.A cold voice suddenly calls out: “Adventurer, wait a moment...”

[Special Containment Procedures]Calamity neared, and a special Containment Subject known as “Bonfire Company” awoke from its slumber, sending out invitation after invitation to join its ranks—“When The Night comes, there ought to be someone to light a fire, to illuminate in all directions.”At the same time, it also brought forth a prophecy.In the year 2044, at the end of a year, a dark disaster would descend from the heavens.

In the end of the world, the fittest survive.

Come back from rebirth, seize the opportunity, just want to survive in the hopeless end times.

Three months before Mu Nan returned to the apocalypse, he sold all his savings to accumulate supplies, hoarded everything he could hoard like a hamster, and then huddled in his own house and lived a low-key life, carefully waiting for the apocalypse to come step by step…

- Description from Novelupdates