One Piece: Human God - Chapter 35: Entering Water 7

Liu Man transmigrated from thousands of years ago to the modern world. Before she transmigrated, she was completely broke. After she transmigrated, she was still worried about her wealth. And so, for her to survive, she decided to start earning money by becoming a cyber star: trading and selling products, recording daily activities with her kittens, and showing off bits of her skills. One day she realized, that unconsciously, she had become one of the most famous celebrities.

In the vast and boundless continent Cangtu, there were ancient sects governing the Ten Old Domains, unworldly immortal clans beyond the Blue Sky, and primordial demon gods dominating the dark abyss that together created a great number of brilliant stories over the long course of the history.

The fallen ones, strange monsters that showed up on earth with the sole purpose of destroying everything and ruling over humans.Only one man remained during the onslaught, his name, was Rashin Montero.“Do you wish to live or die?”The question appeared before him.“Kill me assholes!”He died.A hundred years passed and Rashin finds himself alive in the future.It turned out he was saved by a stray angel, and was granted a powerful energy that allowed him to stand on equal footing with the monsters that once wanted to take over earth.In his new future, the world has been restored to what it ones was, a huge shield was placed around the world to keep the Hakiaas out.Heroes were summoned to defend the world against these monsters during the Countdown, while the monsters could not be killed or harmed, they could still be sent back to their world.Or at least, until Rashin arrived.[Blacksmith System activated. Welcome host.][Initializing core functions... Complete.][Congratulations, you have gained a new blue paint (Large sword.)][Stella blade has passed all requirements to evolve.][Evolving to human form can now be processed.][Congratulations, you have gained a unique core, your weapons can now undergo fusion.]Having a system that allowed him to craft weapons of all kind, Rashin enters this new world trying to survive while also remembering part of his memories.Not just that, he can also turn every weapon he makes into beautiful overpowered maidens capable of killing the Hakiaas aka fallen ones.

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