THE GREATEST OF ALL TIME - Chapter 1: Rewind!

Michael was suddenly reborn into a another world by a God because of an accidental death. To make up for this fact, the God gave him another life in a fantasy world of swords, magic, and monsters.Unfortunately, it turned out that the world he was reborn into was still stuck in the medieval times. It didn't have electricity, it didn't have proper plumbing, and it didn't have any technology that he was so used to back in his old world.But thanks to the God's blessing and an AI assistant called ChatJK1, he was given the power to MAKE his life comfortable. Slowly, Michael transforms this new world into a place even better than his previous one by taking ideas from the modern world and putting it in this world, with the added bonus of magic.

A Lovecraft- inspired darker, grittier One piece fanfic. A fanfic based on emotion and madness. A fanfic not for the faint hearted.----------------Regret. I have been drowning in it for far too long. I’ve regretted every choice I’ve made, every mistake I’ve carried, every moment of my past. I’ve regretted the present I live, the path I walk. Even my future, uncertain as it may be, has been tainted by regret.But not anymore. I refuse to live under its shadow. Yet, I know the truth—I don’t have the power to escape it completely.Am I not like a flicker of flame? So fragile, so fleeting—one puff, and I’m gone.Regret has burdened me, weighed me down to make me climb the towering wall of greatness. But I press on.It was all I could do. All I ever wanted to do.

Nagi who was summoned to another world acquired the「Skill Structure」skill.

Nagi felt the hints of black job from the king’s request 「To defeat the devil king」. He leaves the castle and starts his journey with a slave girl.

The small demon girl Cecyl, the melee-fighter beast girl Rita , Aine the onee-chan maid, Regii the cursed sword.

Rafiria the warm and fluffy elf and Iris the sea dragon shrine maiden.

Nagi rewrites the girls’ skills and made them into 「cheat characters」one after another.

Yang Yi crossed over the world with a storage space with him. He ended up in some desolate wilderness populated by flying beasts and dangerous predators and also crawling poisonous bugs and snakes. To prevent getting bitten in the ass by venomous bugs when going to the toilet, let the great infrastructure begins –
Our goals are:
Eat well till full stomach.
Having clothes to wear but also being good looking.
To have a house that could cover all seasons.
Roads that leads to every place; develop agriculture, industry and commerce together.
No shortage of both material and spiritual needs.
He was DETERMINED to build a safe, comfortable and prosperous modern city in the wild world together with the native tribe with max efforts.

- Description from Novelupdates