Martial King's Retired Life - Volume 1 Chapter 6 The Root of Trouble (Part 2)

The youngest Wiseman of the continent, Chu Tian, has traveled 30,000 years back in time to the age of antiquity due to an accident.

This is a prosperous era. Rare herbs, minerals, treasure relics and monsters can be easily found throughout the land.

However, this is also an undeveloped era. Communications, traffic, martial arts and technology are in its early stage of development. Prosperous cities lack lighting while its citizens are uneducated.

Our decisive MC using his future knowledge creates Magic powered light bulbs, magic powered telephones, magic powered cannons, magic powered computers, artificial intelligence, psyche internet. 30,000 years worth of knowledge allows him to create miracles and shine brightly in this era. Allowing him to conquer the land and sit firmly on the throne of the 10 realms.

- Description from Novelupdates

Once upon a time, a hero had been summoned to a different world in order to defeat the demon king. After the war stretching 3 years ended the commendable hero slew the demon king. And he was forcibly deported back to earth after being dismissed.

Such bullshit!

Elves in addition to beast race, dwarfs and demon race. Even though I wanted to make a harem in the different world I saved! My dream will not come true on earth, where there is no magic at all. Thus, the hero returns on his own. Without the blunder of being extradited to earth this time, he will build a harem of his own in a different world.

Prince Alexander Herald von Triesenberg was the fourth prince of the Empire of Triesenberg who was banished from the Empire of Triesenberg for the crime that he didn’t commit.On their way to the island where he would be banished, a powerful storm swept through and sank the ship. Alexander drowned and at the moment, he thought he died from drowning.However, when he opened his eyes, he found himself lying on the shore of a sandy beach and a floating interface before his eyes.

Wu Jin, as a trainee from a certain entertainment company, had a peerless, stunning face. He was qualified to debut as a lead performer even if he just sat there and did nothing.