I Slaughtered Through the Dungeon Worlds with My Cheats - Chapter 35 - Abnormality Forum, Secrets of the Instance World [Please Follow!]

Within the dream of the dreamer, the one who was dreamed of awoke.

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

“Sometimes it's about remembering and never forgiving.”Jane Devold, the only daughter of the CEO of one of the most successful tech companies in the country, grew up to be a seemingly happy and spoiled young woman, despite her stuttering and fragile condition.However, her rich and elegant way of living ends in a heartbeat when her father goes missing, leaving Jane alone and with an enormous debt on her hands.That's when she reunites with Vernon Lin, her strange and intimidating senior from college, who claims to be the new owner of her father's company and promises to resolve her financial issues if she agrees to marry him.His offer seems harmless, and Jane accepts his helping hand only to realize that Vernon's intentions are not so pure, and his personality is still miles away from that of a knight in shining armor.But what really does feed Vernon's unhealthy obsession with Jane? Whether it's his desire for revenge, his own twisted way of teaching the spoiled young woman how the real life works, or unresolved complicated feelings, he still succeeds in turning Jane's life into a living hell.Until he realizes that without her, his own life is hell, too.

Keith, a regular office worker from Earth, suddenly transmigrates to the world of the novel he had been reading for the past decade. The new world, which was also called Earth, was slightly different. People with various powers existed who were called awakeners, making this world comparatively dangerous and also mysterious. While he was thrown into the novel’s world, he was also given a mystical ability to grant systems to other people. Armed with his special ability, he slowly climbs up the power ladder by taking “taxes” from the people he would give systems to. The only question that remained, was what would a realistic normal man, when faced with a similar minded protagonist, do when their goals opposed each other.