Isekai Maou to Shoukan Shoujo no Dorei Majutsu - Volume 11 Chapter 2 part7-9

This novel is also known as Master Fu's Mysterious Darling Wife

She is the The Young Miss of Military family Shen, her face is peerless, her temperament is cold, and she is her family’s treasure, but isn’t accepted as one’s child by her mother;

He is The Sole Heir to the top giant Fu Family, his power is unparalleled, indifferent high-born, the captain of the mysterious military force, and the youngest commander-in-chief.

Because of her grandmother’s wishes, she married him at lightning speed. She thought that it was a marriage that she needed, but she didn’t expect to be greeted with his extreme pampering.

- Description from Novelupdates

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.

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

Sometimes, as we go about with our lives, we all happen to think of one specific thought at least once.

Eli Turner had perfected the art of coasting through life, gaming, lounging, and vibing with no grand ambitions beyond the next high. But his laid-back existence is upended when his laptop inexplicably transforms into a gateway to another world. What starts as a surreal escape becomes a perilous journey as Eli finds himself wielding a mysterious system that allows him to level up, fight monsters, and gain abilities beyond his wildest dreams.At first, the portal world feels like a haven, offering purpose and adventure Eli never knew he craved. Guided, or manipulated, by Azrael, a mischievous god orchestrating the game, Eli rises as one of the system's chosen players. But as the quests grow more dangerous and Azrael’s true intentions begin to surface, Eli struggles to balance the fantasy world with his life back home. His girlfriend, Sara, and his friends are left grappling with a version of Eli they hardly recognize, as the lines between his two lives blur.When the system expands to players worldwide, Eli crosses paths with others drawn into Azrael’s cosmic experiment: Yumi Tanaka, a fiercely disciplined Japanese student with a perfectionist streak, and Arjun Mehta, a charming Indian playboy with secrets of his own. Each carries their own burdens and ambitions, but all three must face the harsh truth: Azrael’s game is far more than it seems.As alliances are forged, rivalries ignite, and the stakes escalate, Eli must confront not only the dangers of the portal world but the growing rift between the person he is and the hero he’s becoming. In a game where every move is a test and every choice ripples across both worlds, the question remains: can Eli, Yumi, and Arjun uncover the truth before the system consumes them all?