Invasion of the United States - Chapter 222 - 11: Old Guy

Mark is a genius military weapon designer who was kidnapped by a mafia gang after refusing to work for them.
They forced him to design unique weapons for five years, until one day he successfully escaped only to get shot by his trusted comrades.
*Ding! You awakened a weapon system.
When he opened his eyes, he was in a different body and in a different world.
"You want to kill a wild boar without being detected? Forget about bow and arrow. Here, I present you this sniper rifle."
"You want to kill a horde of goblins from the sky? Forget about those flying carpets and brooms. Here, I present you the fighter jet."
"You want to kill a dragon? Forget about taking the help of the S-class adventure team. Here, I present you a nuclear bomb."
Join Mark Spencer/ Lu Zhen as he brings the whole world to its knees with the help of his weapon system.
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Note: Author isn't born in an English-speaking nation and has no editor either. So, please be understanding if there are any grammatical errors.
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In the end, war couldn’t be extinguished. But, there was a transformation. Even in the heart of a worthless accomplice in murder who was indifferently continuing his task, there was a transformation. The massive weapon “Object”.

This was a weapon that changed the whole definition of war. An exchange student named Quenser, who was dispatched to the battlefield, met at the base a girl with a strange aura. The girl, dubbed “Elite”, is the pilot of “Object”. The near future. This diminutive boy had come to take on the role of standing up against the strongest weapon “Object” for the sake of the girl. This was the motive for their first meeting.

Deemed hopeless by her family and that she was better off married when her fourth novel continued to be a flop, aspiring author Xiang Wan begins to doubt herself. While feeling conflicted about continuing her dream as an author, things take an unexpected turn when a dazzling guy appears before her and takes her to the police station.

In a world of magic and abilities, where the strong are revered by the masses and Hunters are treated like gods—Lucien was just a dungeon cleaner.E-rank. Invisible. Average. A loser.Obsessed with Hunters and dreaming of becoming one, but barely surviving on scraps with his crappy rank.Until a cleanup job went wrong—and he died.Or so he thought.[SYSTEM INITIATED]> Do you want to live?- YES- NOOne answer, and everything changed.“W-What is this... this isn’t my body!”The reflection staring back at him was… shorter.Hotter.A face too pretty to be his.[SYSTEM PROMPT]> Do you want to return to your old life?“YES!”Then...[SYSTEM MISSION]> Seduce the strongest S-Class Hunters.Current affection points: (0/1000)“...Excuse me—WHAT?!”And so, the story begins—with a loser trapped in a ridiculously hot stranger’s body, held hostage by a mysterious system that demands one thing:Seduce the top two strongest Hunters… or die trying.