Spirit's Ascension - Chapter 82—Academy Mission.

Jotaro awakened his Stand at 17 years old, but unexpectedly bound to a bastard system. Under the system's effect, he was forced to go to other worlds. In order to return to his own world, Jotaro had no choice but to complete the tasks issued by the system.Demon Slayer world: “Yare yare, Muzan, there's only one reason you failed, and that is, you pissed me off!”One Piece world: “You bunch of guys, I’ll be the one to judge you!” While violently beating up the Celestial Dragons, Jotaro completed a research paper on sea king-type creatures.Naruto world: “The one judging you is my Stand, Star Platinum!” Star Platinum, the true god of ninjutsu, ultimate hand sign speed. You call yourself the Copy Ninja?Originally, Jotaro only wanted to find a traditional Japanese woman to marry and have children, but he seemed to have underestimated the Joestar bloodline's attraction to women. Unknowingly, the women surrounding him grew more and more, and all willingly.The chatter of lovely women behind him made him extremely annoyed.He suddenly turned around and shouted, “Yakamashi! So annoying! You stinky hags!”[1st World: Demon Slayer2nd World: Tokyo Ghoul3rd World: One Piece4th World: Naruto]

Xiao Mengxin accidentally entered the Lixingshe Secret Service.

The only ability is to accurately identify who is the hidden Japanese.

I don’t understand anything else…

As a result, I seemed to be walking astray while walking?

- Description from novelbuddy

Marcus Manfred dreamed of joining the United States Army. That dream ended the day an accident took his life.But he woke up and met a Goddess who told him that he can be reincarnated with a weapon system. He accepted it and was reincarnated in another world.The Military Weapon System, grants him access to modern weapons and equipment. Rifles. Tanks. Fighter jets. Even warships. But everything has a price.To grow stronger, Marcus must take on requests from towns, nobles, and kingdoms: clear monster nests, hunt demons, repel invasions. Each completed quest earns him funds to expand his arsenal.But this world is not Earth.Magic bends the rules. Dragons rule the skies. Demon armies march in the dark. And medieval kingdoms do not take kindly to a man building a private army beyond their control.In a world of swords and magics, can Marcus survive using his modern weapon cheats? Or will magic crush modern firepower?

All the people came to the Chaos Continent, became the lord of one party, and participated in the struggle for hegemony among all ethnic groups.

Tinder is the authority of the human lord. You can sign in on Tinder every day to get population, blueprints, food and other materials.

Huang Yu signed in on the first day and got a discounted artifact.

A batch of discounted products will be refreshed every day for Huang Yu to buy.

then……

“This legendary weapon is only 10,000 magic crystals after the discount? I bought it!”

“0.5% off dragon eggs? Give me 100!”

“0.0…01% off the extraordinary arms training camp! There is such a good thing? Come to the bowl!”

…

Since then, Huang Yu and his territory have become famous in the Chaos Continent!

- Description from novelbuddy