My Wives are Beautiful Demons - How does the Demon World work?

I tried to establish the Tokugawa Shogunate in another world.With the knowledge of the ruler of the country, the young Ieyasu unifies another world!?Has the era of Ieyasu the old fox already over!?This is the story of the super-cheat young Ieyasu and the naïve elf princess unifying another world!Tokugawa Ieyasu, the ruler of the country.He thought he would die a regretful death after eating tempura, but he suddenly found himself reincarnated in an unknown world with a 20-year-old body!?Moreover, after saving the elf princess, Seraphina, from a human thug, he is appointed as the general of the “Edda Forest”, which is on the verge of destruction.He is a coward and a thrifty person, who think that he can simply waits until his enemy dead before fighting.Ieyasu’s mind is not like a hero, and because of coward’s disposition, he begin to gather useful people in the “Edda Forest”.The cheapstake dark elves are are being made to raise funds.The dwarves, who dig holes all the time, are tasked with flood control work and building secret paths.On top of that, he even employs a family of assassins to control information.Ieyasu is reforming the “Edda Forest” to be like the Tokugawa Shogunate, butーー

【Host, host! I might be late, but I, the Femme Fatale Conquer System, am here to accompany you!】

【Now, let’s first conquer Momoana, a legendary female emperor who boasts looks and wits.】

Shu Yichao: “Charge, my nomads! Show them our unrivaled archery!”

And so, Momoana died.

【My host, I’ll assume what happened earlier was an accident. We have to succeed for the next one. Our next conquer target is Purin, a lofty and cold sorceress.】

Shi Yichao: “Clear the mobs and stack skeletons! I shall bring the undead calamity upon the world!”

And so, Purin died.

【…Maybe you didn’t hear me clearly, my host. I said court her, not cull her. Our next target–】

Shu Yichao: “Build the hive and spam the worms. My hive mind shall devour the world! Who can compete with me?”

【…】

Shi Yichao: “Halleluyah! I have finally gotten rid of every single one of them! Speaking of which, System, it has been a long time since you last spoke to me?”

【I’m tired. Just go and destroy everything.】

A mechanical engineer Poul Nielsen along with his best friend Jonathan Axelsen a civil engineer died after a truck crashed at the coffee shop where they were hanging out and got transmigrated in a late 19th-century parallel world, in the country of Avalonia. It was at the height of the second industrial revolution and to survive daily, they’ll have to work like others to earn pennies to get by the day. However, the two didn’t settle for less. They want to be the Edison, the Chrysler, the Rockefeller, the Carnegie, the Ford, and the Westinghouse of this new world.

This world doesn’t seem to have electricity? Then let’s start an electric power distribution company. Light is not enough, let’s build appliances and motors as well to make our business profitable.

This world doesn’t seem to have vehicles and ground transportation relies solely on horse-drawn carriages and trains. Let’s start an Automotive Manufacturing Company.

Huge infrastructure projects such as metro stations, skyscrapers, bridges, tunnels, and dams? Let’s start a Civil Engineering firm and build miracles in this world.

There is always money in guns, they say. Fine, let's invest in another venture, the arms manufacturing company.

And before we even know it, we will be the richest men in the world. However, the path won’t be easy as fierce competitions are up ahead. Robber barons who would do everything just to crush their competitors. Predator against predator, and government intervention.

“Since I was born, I’ve had the same dream every day, where the same day repeats over and over.”“What do you do in the dream?”“Rob banks, blow up buildings, flirt with girls, play Grand Theft Auto… since it’s a dream, I naturally do a lot of lawless things.”“Tell me what you did last night.”“Last night was more interesting. I’ve been dreaming for so long, but it’s the first time I’ve dreamt of someone I know in real life. She was a very beautiful girl…”“Mhm.” The police officer nodded while taking notes. “Go on, I’m listening.”