Moto Sekai Ichi'i no Sub-chara Ikusei Nikki - Chapter 5: Conclusive differences

The Supernatural era descended, the rules changed, mystery arrived, and the world altered. Countless ruins of civilization emerged, and an abundance of Heavenly Materials and Earthly Treasures lay at everyone’s fingertips. Radical faction, “This is the best of times, entering a new world, excavating relics, mass evolution!” Conservative, “This is the worst of times, with countless monsters outside, once you leave the Safe Zone, extinction awaits humanity!” … Meanwhile, at a remote ruin, Lu Yuan successfully discovered new treasures and sought after the mysterious wealth, desperately trying to contact his fellow Earthlings. “Found a communicator, can it get through?” “Hey, humans—I’m almost becoming a god, and you’re still hiding in the Safe Zone?”

In the foreign world, the martial artists dominate the world and the sword of the emperor controls the fate of hundreds of millions of lives! Long Yu, the number one killer on Earth, after dying, takes rebirth in this new world in an aristocratic family of martial artists but faces rejection because he is unable to practice martial arts.

- Description from Novelupdates

Mother-in-law, “Add another 200,000 to the bride price, I want to switch to a new apartment!”Younger brother-in-law, “Don't think you're the boss just because you shelled out some stinking money!”As Song Yun was fuming, a voice echoed in his mind.Ding! Host successful check-in, reward: Magic Capital's top beauty!While everyone was entangled in the dispute, a Lamborghini approached from afar.The car door opened, and a peerless beauty stepped out and took Song Yun's hand.“Song Yun brother, let's get married!”