It Turns Out, They Are the Protagonists - Chapter 432: Thirty Years East of the River, Thirty Years West!

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.

Soul System Online...][Vengeful Spirit Detected]Zero was once a legend a warrior feared and respected across the land, an SSS-ranked hero at the peak of power. But even the strongest are not immune to betrayal. His so-called allies turned against him, casting him into oblivion. Now, he lingers as a vengeful spirit, unable to move on, his legend seemingly forgotten.But fate isn’t done with him yet.When a mysterious boy with the rare ability to see and communicate with spirits crosses his path, Zero sees a chance for revenge and maybe even redemption. Armed with the enigmatic Soul System, he will carve a new path, defying death itself.The world thinks it has seen the last of him. They couldn’t be more wrong.The SSS-Ranked Troublemaker has returned. And this time, nothing will stop him.

A few years after graduating, Chen Hui was mediocre and suddenly found himself back in the scorching summer of 15 years. It seemed that it was not just a simple rebirth, but a plug-in was accidentally attached. Money, beauty, and power followed. Easy cool text! …

- Description from novelbuddy

After transmigrating into a beast world, Rong Mingshi discovered that the people of this world experienced widespread mania. For example, when their emotions were abnormally agitated, they would become destructive beasts. If their emotions were abnormally low, they would shrink into their young beast form.