Ichiban Ushiro no Daimaou - Volume 9, Chapter 1 — The Beginning of the Final Battle

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.
***
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.
**************
You can also support the Author through Patreon

https://www.patreon.com/snowstar

Kyo Mazuru traveled to the world of Bleach and landed in the forest of Menos Grande at the beginning.Picking up a asauchi left over from Shinigami's death, and starting with a sword, he spent hundred years in the forest of Menos Grande to survive, slashing countless hollows, and his slashing skills reached the peak, until one day, he met a man who claimed to be Mr. Aizen Sōsuke!Mr. Aizen couldn't bear him to live alone in Hueco Mundo, so he invited him out of there and brought him to Soul Society!After that, Kyo Mazuru's Shinigami career began!

When Xu Ying woke up in the post-apocalyptic world, she found herself back at eighteen years old in her previous life!Luckily, her portable space was filled with spoils from raiding supermarkets, including clothing, food, shelter, and various weapons and medicines.This made Xu Ying ecstatic.In an era of scarce resources and poverty, she had enough to ensure her family lived a good life.While other families favored sons over daughters, Xu's family had always cherished Xu Ying as their precious jewel. Having squandered a good hand in her previous life, she was determined to do better this time by kicking scumbags to the curb and tearing down the 'green tea' women, all while protecting her family and incidentally snagging the toughest man in the village!Huo Chen had a solitary nature and fearsome appearance, causing children to cry at the sight of him, but Xu Ying, who had honed her skills during the apocalypse, was not afraid of the notoriously fierce man at all.Xu Ying: What do you want to do? We're just partners.Huo Chen: You think you can seduce me and then run? No way.

Chen Qizhao was reborn and returned to the age of 18 when he was still the wicked little overlord of the Chen family.

At this time, his brother hadn’t experienced a car accident while his parents were in good health and weren’t seriously ill. The Chen family was still the prosperous Chen family and everyone thought he was a good-for-nothing who was useless and easily taken advantage of.

“He only knows how to quarrel with his older brother every day. He is arrogant and willful!”

“He looks good, but unfortunately, he is an idiot.”

“Isn’t he a useless person? Just serve him well.”

“It is a pity about that child of the Chen family.”

There were the group of scoundrel friends who were full of thoughts, the rats eyeing him covetously and the old, cunning people who were secretly scheming.

Chen Qizhao put on a mask of arrogance again. ‘Do you like acting so much? Why don’t we act together?’

It wasn’t until later that everyone discovered that at the end of the play, they would either go bankrupt or be imprisoned.

- Description from Novelupdates