Martial King's Retired Life - Chapter 3Book 15:

Until he became the lowest-ranked master, his lonely and luckless life never changed.Suddenly one day, a descendant injected him with a nanomachine, and the machine started ‘speaking’ to him.[I am the seventh generation Nanomachine manufactured by Sky Cooperation, and I am operating as a central nerve connected to your brain.]“What? What are you talking about?”This was beyond the boy’s knowledge, he turned pale.The Nanomachine linked to his cerebrum realized the User was not understanding a single word it said.“Who are you, and why are you doing this to me?”[“I am the seventh generation Nanomachine.]“Nano Machine?”[Yes, Nanomachine.]The boy’s face hardened.Mashin was the deity the Mashin Religion worshipped, along with the Sacred Fire.The religions’ Master communicated with Mashin.“Um, are you really Mashin?”The boy knelt down and asked with a trembling voice. At this, the Nanomachine attached to his cerebrum realized it had been misunderstood.

Having traveled to the year 1983, Lu Jiaxin found herself at the start facing the failure of the original host in a high school exam, a stepmother who was sweet on the outside but dark-hearted, and a purely self-interested father.Designer Lu, facing a hellish start, decided: if her stepmother made a move, she'd countermove tenfold! If her father failed to act like a human, she'd teach him how to!She still intended to continue college; she heard that the degrees from Hong Kong University in the '80s were quite valuable, so she flung her sleeves and bravely explored the financial and business circles of Hong Kong.Bulky mobile phones, beepers, “007” on the dance floor!Victoria Mountain, Shallow Bay, female tycoons of Victoria!

Dale Mitchell, your average guy in a below-average job. But, what happens to him is anything but average. After hitting someone in his truck, his world was turned upside down, inside out, and more than fifty shades of grey.

Now, he seems to be something called a World Keeper, and must create and manage his own world. Is this his afterlife, or something else entirely?