I became the Counterpart of the Winner in a Period Novel - Chapter 99 - 96: The House Collapses (Bonus - , Please Vote)

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 do you do when your brother dies because of some entitled assholes? You go undercover.My real name? Clare. But at school, I’m Clause—just another guy blending in. Disguised. Watching. Yes, a boy. No, it's not an all-boys school—I'm just deep undercover, hunting down the bastard responsible for my brother’s suicide. Nobody—and I mean nobody—messes with my precious brother and gets away with it. They better pray I never find them, because when I do? Death will be a mercy, and trust me—I don’t do mercy.And as for the egotistical Alpha and the narcissistic Vampire Prince? They can go fuck themselves. I don’t do mates, I don’t do claiming, and I sure as hell don’t do them.

The main character is reborn as a character from a game he played in his previous life. This character falls into ruin along with the villainess, spending the last of their years together. A man named Kururi Helan.

Wandering for fifteen years, Jiang Sheng picked up five elder brothers for herself.

For their sake, little Jiang Sheng went through fire and water, desperately making money.

The elder brothers didn’t disappoint her, giving everything for their little sister.

Until the General’s mansion discovered the switch of the legitimate daughter, and hastily brought her back.

But they didn’t treat her well either.

Some ridiculed her vulgarity, some laughed at her ignorance, some scorned her coarseness.

Yet no one knew, the new top scholar was her brother, the newly rich royal merchant was her brother, the returning victorious little general was her brother, the saintly healer was her brother, and that one… was also her brother.

However capable the fake young miss is, does she have five elder brothers to support her?

Note: The main characters have no romantic relationships, the female lead has a childish personality and focuses on familial love!!!