Mr Gu's First Doting Marriage - Chapter 75 - 76: Don’t worry, I am still a gentleman

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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The Apocalypse is in full swing. Defiled - powerful creatures corrupted by the Great Collision - prowled the lands in search of prey. Unfortunately for them, the human race had long since retreated behind the secure walls of the Sanctuary of Everlast. During one of his regular excursions outside the Sanctuary, Alden is separated from Celeste. - his childhood friend and crush. In that moment, he came to regret never summoning the courage to confess. Somehow managing to survive thanks to some trickery, Alden awakens as a mage. Instead of receiving a normal power, he gains the ability to decay. What’s more, during his ascension, he received a vision from his future self advising him not to trust the Asterons - celestial beings who had saved his race from inescapable doom. Normally... such a revelation wouldn’t faze Alden. However, there was only one major problem with the declaration, though. Celeste was bound with an Asteron. And not just any normal Asteron... She had made a pact with one of the Divine Sovereigns.

Of all the characters in this story, it had to be the son of a bitch!?Thanks to the courtesy of Truck-kun, I was transmigrated into the famous yet garbage novel, [Hero's Apocalypse].The character I possessed was a third-rate extra who had the [Talent] to 'plunder' other talents. Yet, as overpowered as it might sound, the conditions to fulfill a successful plundering were extreme, making this character truly befitting a third-rate trash.But that's not what's important right now—it's the fact that this man's role in the original story was his very death, and I opened my eyes after the original body just finished killing himself.“Fuck! Why did you attempt to sexually assault the Imperial Princess?!”Feeling livid, I strongly punched the mirror in front of me, knowing that as soon as I gained a new life through mysterious means, others would inevitably come to take it because of this bastard's unforgivable sin.But I wanted to survive...Motherfucker, can I do it?!