History's Strongest Son-In-Law Living With The In-Laws - Chapter 5

A high-schooler who loves playing FPS games were reincarnated in the fantasy world. And usually, those who were isekaid were blessed with overpowered magic and a legendary beast. However, our main character is different.Instead of those things, he awakened a shop system where he could purchase American freedom! And since modern guns is as good as magic, he decided to make full use of this ability and make a name for himself in this new world.Fireball? Cute. My M203 grenade launcher makes a bigger boom.Summoned beast? That’s nice, I’ve got a UAV with thermal optics.You can split oceans with magic? Cool. I can erase cities with a nuke.Whatever overpowered spell you’ve got, I’ve got something better.

There are always four kinds of people in the traditional Mary Sue world. The Male Lead, the Mary Sue female lead, the woman who never wanted to see the female protagonist live a good life, and the infatuated man willing to destroy heaven and earth to get the female lead.

Quinn Winter is a young man from another world. One day, he is suddenly chosen to become the new Demon King. But the Demon Kingdom is in big trouble – it's losing a terrible war against the human kingdom called Gran'le.To help his people, Quinn comes up with a risky plan. He will sneak into Gran'le and learn their secrets. But things don’t go as planned. A powerful noble sponsors him, and he ends up joining Heavenward Academy, the top school for training future heroes.At the Academy, there's a big challenge called the Selection. The best students become Paladins – magic knights who fight demons. Quinn doesn’t want to become a Paladin. He is a demon king! But now, he’s stuck in the Selection… and if he wins, he’ll become the very thing he’s supposed to destroy.He started the day badly. Now, things are getting even worse.

“With my knowledge, give me a fulcrum on which to place it and I shall move the world!”

…

Sorcerer Continent—a world where sorcerers exist. Wielders of arcane knowledge. Masters of all elements. Sovereigns of space and time. These sorcerers governed the world with their unrivalled prowess. One day, a young man awakened into this world with his past forgotten and no place to call home. Follow along as Glenn, by relying on his luck and wit, tries to survive and advance in this unforgiving world. Entangled within the machinations of fate, political schemes, power struggles and wars, he forges his own path and creates a place for himself.

- Description from Novelupdates