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

Zander immediately got up from the floor grabbed the server who was carrying a plate filled with wine glasses close to the crowd. All of the wine spilled as the glasses shattered but he grabbed one bottle midway before tossing it at Keith who was still dancing with Amelia.

The bottle rotated at it flew and struck Keith right at sight of his skull as he was spinning.

The entire hall went silent as Keith slowed down and finally stopped. He let go of Amelia's hands and turned around to look at Zander who was glaring at him.

"Hmm... I didn't expect the second prince to have such a short temper. If you can't dance, get the fuck out and let the others continue. You don't have to fight and ruin the atmosphere."

"YOUU!! You were the one who pushed me!" Zander said as he stomped the ground and walked towards Keith.

The sound of a slap resounded across the hall, making the nobles gasp as Zander brought his trembling hand to his cheek.

Slight Guilt