The Villainess Returns with a System - Chapter 58: Titania

Five hundred years later, a superhuman talent cultivated by the state perished during a mission, and his soul transmigrated, taking possession of the body of a young master from a prominent family who suffered from an anxiety disorder. From that moment on, his extraordinary life began, spanning across various fields such as business and medicine. Wherever he set foot, others could only look up to him.

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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What got summoned was the world’s strongest sociopath.

After learning about my girlfriend's infidelity, I got drunk and woke up in the world of the novel R-19.I became a character who is not even included in the extras of the novel — the useless and unnecessary daughter of the Duke de Walt. However, I didn't care about it, because I knew what this world was waiting for ahead.In the near future, the Ruvens Empire will be mired in chaos, and in order to survive it, I decided to quietly sit out in the manor enjoying a luxurious life. Everything went according to plan, until one day I made just one fatal mistake.A year after my rebirth, I accidentally found a wounded commoner in the forest. Out of pity, I decided to take her in and kept her. We lived together until I found out that this was the main villain who was supposed to die at the end of the novel. But because of my interference, the plot of this damn book continued with me!I have to run now! But where...?!After all, this crazy woman is now stalking me.— Where are you going, lady?— I… just went out for a walk.— Take a walk? The border of the empire is not the best place to walk. Let me walk you back.With the sword in her hand, I didn't have a chance to refuse.