The Mechanical Revolution In A Fantasy World (Rewriting In Progress)

A young lazy boy was just doing his daily routine in his house, daydreaming about getting out of poverty. With a dream of earning money without working so that he could finally do his hobby of inventing random things.

So what would happen if we send him into a fantasy world for him to rule with the power of a country building system? Not by Truck-kun, but by a nuclear explosion?

Come and find out!

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PS:

This story is NOT a fanfiction, this is an original story but with crossovers from other similar or different stories, be it novels, mangas, or animes.

This is also my first story so expect the "story style" to be different from other stories.

Most photos are not mine and I give their creators their respective credits.

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More:
Updated the title and cover of the story from "Building the Most Advanced Civilization in Another World" to "The Pandora's Ruler - The Mechanical Revolution in a Fantasy World" as the story is not going to continue the supposed track and will have more interesting and different scenarios and stories from what was originally planned.