My Civil Servant Life Reborn in the Strange World - Chapter 15.

Back in 1991, in the face of this golden age, Chen Jianghai swears that he will only live in three words in this life: Lin Wanqiu! The story of a reborn person who built an electrical empire and reached the pinnacle of his life!

- Description from novelbuddy

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 ͡°)

Being in the World of Arknights...Thing's are going to change drastically and...You best be ready for what's to come ahead.

Traveling through the world of comprehensive martial arts, Xia An awakens the god-level corpse-touching system, as long as he touches the corpse, he can get various rewards!

I wanted to develop wretchedly, but I just became a six-door patrol, and I was ruthless at the beginning!

Ruthless: “The pervert will die!”

Xia An: “Obviously you rushed up by yourself, so can you go down to the ground now…”

With being involved in various disputes, Xia An’s strength is constantly increasing.

“Ding! Congratulations to the host for touching Ye Gucheng’s body, gaining 20 years of internal strength, flying immortal sword moves from heaven and earth.”

“Ding! Congratulations to the host for touching Yang Dingtian’s corpse, gaining a hundred years of skill, and moving the universe.”

…

Many years later, Emperor Ming looked at Xia An with a wry smile.

“Wu Wang, why don’t you be the emperor?”

- Description from novelbuddy