After Being Transported into a Book, I Adopted the Villain - Chapter 60: Letting Go

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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Discovering that his wife was cheating on him with his superior, Jonathan Hayes was put on the combat list by his superior, a list that had already been concluded weeks ago.Wanting to survive from the war and come back to get his revenge on his wife and his superior, Jonathan was killed in the battlefield.Instead of going to heaven like every good man should, Jonathan woke up five years back in time, before his country was captured by the enemy, due to the help of his country's corrupt leaders. Jonathan knew his job immediately he realized what had happened to him. To liberate his country from getting captured again, and to get his revenge on his cheating wife and his superior.He had guessed correctly, but there was more to it. He not only went back in time, he woke up in a parallel world where magic was present. His job was not only to rescue his country from getting captured again, his job was to become the first warlord of the world. The first king of the whole world.[Congratulations, you have been rewarded with two unique skills from God]

After finding out that her boyfriend was cheating on her, Qiao Sisi slept with a handsome stranger she picked up at the bar, only to wake up and realize that he was Zheng Zeyi, the cousin of her deadly rival, Yang Yueyue. She fled the room in a fluster, and put the embarrassing drunken fumble behind her.

Unexpectedly, the cold, roguish Zheng Zeyi came to her with a proposal—enter into a contractual engagement with him! It was a tempting offer Sisi could not resist, and it came with other perks. He could help her get a foot in the door of the prestigious Jinyu Company. It was a dream come true for an aspiring jewelry designer like her!

Sisi threw herself into the career opportunity of a lifetime, and as she exchanged barbs with Zeyi, she felt the first stirrings of attraction to him. Meanwhile, the resentful Yueyue was determined to thwart both her ambition and her blossoming relationship with her cousin.

My name is Joo In-gong. The name that my parents gave me meant ‘protagonist’ of the world. Really?