MTL - My Senpai Knows Magic - Chapter 259 Theodore's Reminder

After Cen Si Miao died, she followed the system developed by Jin Jiang and the local government. As she went from place to place, her skill at digging holes for others to fall into became better, and she became more familiar with saving the male protagonists. Pa, pa, pa, face slapping became more even satisfying. But still, somehow she always got carried away by the male protagonist in the end.

- Description from Novelupdates

This story is about the romance that blossomed between a beautiful princess and several courtiers, told through the various positions they experienced together.

What happens when a scientist from a futuristic world reincarnates in a World of Magic and Knights? An awesome MC is what happens! A scientist’s goal is to explore the secrets of the universe, and this is exactly what Leylin sets out to do when he is reincarnated. Dark, cold and calculating, he makes use of all his resources as he sets off on his adventures to meet his goal. Face? Who needs that… Hmmm… that guy seems too powerful for me to take on now… I better keep a low profile for now. You want me to help you? Sure… but what benefit can I get out of it? Nothing? Bye. Hmmm… that guy looks like he might cause me problems in the future. Should I let him off for now and let him grow into someone that can threaten me….. Nahhh. *kill*-

Alternative: Leylin is transported from an advanced technological era into a medieval world— except there’s magic. Equipped with “only” his quick wits and an A.I. chip fused to his soul, he sets out to become the most powerful magus the world has ever known. In a land divided into the Light and Dark Magi, the weak can either be cattle or disposable slaves. Only the strong can determine their lives, and only they have the luxury for virtue. Yet strength is only a tool for Leylin, like any other. His goal, in the end, is his own.

"There is a thin line between poison and medicine, and I shall make you dance on it!"