MTL - Your Teacher I, am Hella Rich - Chapter 27

A young man was going about a normal day, and he went back home to his house being empty again, his parents had missed his birthday again.Just like all the other years before, there was nothing special about his 18th birthday it seemed.This however was far from the end, caught by something unexpected at his own house, he perished.It was supposed to be the end, however this only marked a new beginning.Faced with a great trial of will, and Karma, and passing with a score beyond anything else, he was given the Class Omni-Layer, and the Job Omni-Ruler along side a system to manage it all.All this to prepare him for a new world, a world of swords and magic, and classic isekai, but this world was anything except an easy trip.

After a sudden and inexplicable transmigration, Maximus finds himself in a fantasy world where extraordinary power exists. But he is not without his advantages; he possesses a system that grants him the ability to become stronger as he takes on wives and birthed children.Determined to conquer this new world, Maximus uses his cheat to gather wives and birth children, building up his power and influence. As he gains more allies and resources, he sets his sights on the ultimate prize: ruling the world and surpassing even gods.However, the road to conquest is not an easy one. He must contend with powerful factions, rival conquerors, and unexpected challenges as he builds his ideal empire. But with his cunning mind, he is determined to succeed and become the greatest conqueror the world has ever seen.

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

A series of short stories in the world of Toaru Majutsu no Index organized into chapters featuring Kanzaki Kaori as the protagonist, going around the world and space doing missions for the Church of Necessary Evil, however, there is more than meets the eye as each incident is connected.

One chapter was bundled with each limited edition release of the Toaru Kagaku no Railgun anime DVD and BDs, with all of them together being equivalent to a single normal Toaru Majutsu no Index volume