MTL - Dressed As the Heart of a Paranoid Boss - Chapter 844 President, I was wrong again

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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“You don’t want to learn math and you don’t want to learn English, so what do you want to learn?”

“Do you teach anything I want to learn?”

“Crap, otherwise why would I come to teach you as a home tutor.”

“I want to learn how to kiss.”

“……”

I originally thought that when I was going to tutor i was going to meet a little puppy, I didn’t expect it to be a little wolf dog.

Later, Yu Wan looked at Han Ye seriously: “Sorry, I have never considered finding a boyfriend younger than me.”

“Even if he’s an hour younger than you? ”

“A minute younger!”

Han Ye also thought about it, and the handsome boy approached her with a smirk. “Then you should start thinking about it now…”

- Description from Novelupdates

What is my 1000-year-old monster self to do when I’ve failed my immortal ascension? Time travel — accidentally — and wind up back in my 9-year-old body, needing to re-cultivate, of course. But after that? Get REVENGE! Muahahahaha! But the idiot who killed me — also accidentally — was the main character of the dumb harem Xianxia I transmigrated into. But wait. Wasn’t he only 7 or 8 at this point in time? Well, since I can’t harm a child or the main character without suffering in some way, then I’ll just have to raise him better, faster, stronger, and loyal! Muahahahaha!