Potaatoo

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.

God of Systems: Maker of Heroes and Villains

While Keith was lazing around on his bed with Clara, he heard a knock on the door and went to check out who it was.

Once he opened the door, he saw a petite woman holding a letter in her hands.

"Sir, there's a letter for a man named Keith Zenister and it is from the third prince." she said and waited for a response instead of just handing the letter over to Keith.

"I'm Keith, thank you." he said and extended his hand forward as he looked at her, waiting for her to give him the letter and she did, albeit a little flustered.

She bowed slightly, "I'm sorry for not being able to tell sir, I apologise for my actions earlier."

Keith waved his hand, "It's fine, have a nice day." he said and closed the door before he tore the envelope open and unfolded the letter that was inside.

"What's it about?" Clara asked from the bed while she looked at him.

Nathan's Unfortunate Accident