MTL - Begging You to Break Off This Engagement! - Chapter 3 Toilet financing

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.

A veteran player of “Starry Abyss” and a Meteor Fall Master known as Ace Bro, Li Zi came to the game world with his system template, arriving at the era of the game's beta version.This was the worst of times.Cosmic forces and financial magnates colluded, causing The Gate to the cosmos to be shut, planets' resources exhausted, even sunlight monopolized.It was also the best of times.All the Extraordinary Systems had just started, and in this era, only he possessed the final version patch as a Meteor Fall Master.While people reveled in the smoke of plasma cannons, Li Zi had already torn apart warships with Gravity.As Special Ability users proudly indulged in their awakened abilities, Moonlight had already become a servant to Li Zi.When the Interstellar Fleet crossed the Galaxy, Li Zi had just ignited the forty-second Stellar, illuminating the entire cosmos.“People have been trapped on the ground for too long and have forgotten that this Starry Sky should belong to us all,” he said gently, holding a black hole in his hand while facing an indescribable native Evil God.

A very sweet entertainment circle novel about a closeted gong x fudanshi shou.

- Description from Novelupdates

A man is reborn into the world of Avatar: The Last Air Bender as a waterbender from Katara's tribe. Best of all, he was the same age as her, and he had a system with him to help.He knows the future and a system that lets him continuously get stronger by completing quests or long-term missions, as well as giving him the ability to copy abilities from others for himself. He will become invincible in the world of Avatar, even more so than the Avatar himself.