It Seems That I've Slipped Into a Different World. Also, My Gender Has Changed. - Chapter 36: The Heartwarming, Villa Night Chat

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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Waking up from a hangover, Wang Hao finds himself reborn in an alternate world. To his delight, he realizes that he has a system to help him in this new world. However, his system turns out to be a highly unconventional one. Instead of serving justice and winning the respect of other people, Wang Hao has to do all kinds of bad things in order to make use of the system. So, Wang Hao embarks on the journey to being cursed for good…

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Copy:

Undercover police officer: We are two-on-two, so we can’t be careless.

FBI undercover: I’m in a one-on-three, and I have to be vigilant.

Zhenjiu: My teammates are very reliable, I don’t need to worry at all, and I give comrade hr Jinjiu a five-star praise.

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The semi-invincible text, some of the protagonists refer to Dazai Osamu, the stray dog.

Without a heroine, the only thing that can make the hero’s heart beat faster is the bill.

- Description from novelbuddy

With so many people in the entertainment industry, the most unpleasant thing for Ye Chen is the hypocrisy of Ren Jing. Ren Jing looks pleasing and upright but Ye Chen couldn’t listen to half a sentence he says.

Then one night, Ye Chen got drunk. When he woke up, there was a naked Ren Jing next to him.

Ye Chen: Son of a *****!

Ye Chen escaped resulting in an accident and dying. Then, the time was like in rewind and he saw himself sitting in his car a minute before he died. He heard a voice inside his head.

“Daily task: kiss Ren Jing and reward after completion; the survival point: 1.”

“Friendship Tip: If the survival point became zero, you will die.”

Ye Chen: ! ! !

- Description from Novelupdates