World's End: My Keyword is One More Than Others - Chapter 16: Peacekeeping Vanguard

Felix Ariel, a typical Floridian, found himself transported to a mysterious kingdom in another world. However, a misunderstanding led to Felix accidentally killing the king, resulting in his untimely demise.Following this tragic event, Felix's spirit encountered a mysterious being who identified as Felix's ancestor. This entity claimed that Felix had been cursed by an unknown individual. For Felix's safety, the ancestor bestowed upon him a system for self-defense.Upon returning to Earth, Felix realized that he would be transmigrated to the alternate world at noon due to the lingering curse. To prepare for this unexpected transmigration, Felix relied on the system, which required him to gather oil and gold to enhance his abilities.Thus began Felix's quest in the other world. With his system, he brought firearms and an ambition to spread liberty... for prosperity and freedom.

Xia Zhijun got the title ‘study god’ after scoring first place in the whole city. He’s the model of a good student in a teacher’s eyes: good grades, good manners, and quiet. When he wasn’t smiling, his entire body emits a cold abstinence aura. The girls only have the guts to look from afar and not get close.
Later, it was rumored throughout the entire school that even the study god would fight and hit on girls. Whoever dared to provoke his girl, he would teach you how to be a person at every minute. The night of the graduation ceremony someone saw him blocking Gu Siyi in the corner. He didn’t stop kissing even when she cried. He bit her lips and said in a raspy voice, “I’m going crazy…”
During college finals, Gu Siyi almost bursted out crying, “I’m such a failure. I won’t be able to find a good job in the future…And if I can’t find a good job, I can’t provide for myself…”
Xia Zhijun played with her pink earlobe and remarked, “I’ll take care of you.”
After they graduated, Xia Zhijun created a research company and Gu Siyi became the boss’s wife.
The commercial rocket, “Star of Siyi” was successfully launched. So everyone knew that the new technology superstar, Xia Zhijun has a wife who he spoils a lot.

- Description from Novelupdates

Ajax used to coast through life before his parents died, after that he focused hard to try get his life back on track but that wasn't really happening and it all ended the day he got mugged. Given a second chance at life he now looks to become someone who matters and is willing to work hard from the beginning to make that happen.

In her previous life, Jiang Yan's mother was murdered by her stepfather under the guise of celebrating their wedding anniversary with a trip abroad, and Jiang Yan herself, holding a huge inheritance, was locked by him in the basement of a villa and had one of her hands mangled. As natural disasters became more frequent and the apocalypse descended, the stepfather's family, hiding in the villa waiting for the apocalypse to pass, ultimately set their sights on Jiang Yan...With the opening of her eyes, Jiang Yan was reborn three months before the apocalypse. After activating her portable Space and successfully taking her revenge, she, now in possession of a massive amount of funds, started a global shopping spree: yachts, helicopters, off-road RVs, weapons, amphibious boats, necessities for clothing, food, shelter, and transport; everything from five-star delicacies to tasty street food hidden in remote corners... she bought and hoarded them all, bringing everything into her Space!Seeing that there was only one month left, Jiang Yan began a cramming-style learning binge: shooting! Flying planes! Driving boats! Hand-to-hand combat! Agricultural Planting! She even learned how to operate an excavator from the Red Xiang Technical School!In July, a double typhoon that caused seawater backflow starting from Japan marked the beginning of the apocalypse. A super high temperature wave followed right after, sweeping across the globe, along with torrential rains, earthquakes, pest infestations, extreme cold, nuclear contamination, mutation of animals and plants... one natural calamity after another ensued!While others fought over a packet of instant noodles or half a bottle of water, Jiang Yan was leisurely planting vegetables, raising fish, sitting comfortably in her safe house with air conditioning on, and enjoying her hot pot meal~PS. This entire story is fictitious.