Gimai Seikatsu - Days With My Step Sister - Chapter 42 - 6

When she woke up, her nightmares began.After a tragic accident, Lu Mengjie woke up with no memory of who she was, unable to recognize the people around her as well. Without her memories to guide her, she was like a blank canvas... that was until the Devil from her past finally appeared.The Devil was known for his cruelty, a heartless man who only cared for himself and no one else. He would use anyone as his pawns, however he liked. He was a selfish tyrant walking freely in the world he saw as hell.They were two imperfect souls; one was damaged, and yet, she had a fire burning inside that refused to be put out by the iciness of the world around her, while the other was filled with complete darkness, as the world had eaten him alive with its brutality.Simply intended to be together, their love for each other was perfectly imperfect, and out of their control.Join Lu Mengjie on her journey to unravel the mystery of her accident and the enigma that surrounded the Devil in her memory. Their love would be tested. Lives would be lost. Love conquers all but would their love be strong enough to withstand what's coming their way?

Xu Mo, a modern high school student was sent back in time to Jing Kingdom and found herself trapped inside of the body of a princess with the same name.

She had barely recovered when she learned of an unparalleled fiancé and in a daze, they got married. Then the stunning genius physician who normally does not pay attention clamoured to marry her. After that, there was a cold general, a flirtatious lord, a tsundere young master……

As it turns out, this was a male-dominated dynasty. Because the female population was sparse, the entire nation shared wives regardless of rank or nobility. Is it feasible for someone who wants to maintain monogamy in this dynasty?

- Description from Novelupdates

Payload specialist, Tang Yue, who is a mechanical and electrical engineer by training, is left stranded on Mars when he receives news from his AI robot assistant, Old Cat, that Earth has exploded. He believes himself to be the last human in the Universe.