The Vampire Cat System - Chapter 19 Spirit Magic

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

Seven billion humans living on the Earth time-traveled together after they had woken up one morning. They all heard a synthesized female voice.

“I won't divorce you, Melissa. Until your last breath, you will live with me in this nameless marriage,” Radulf declared.Melissa Rosetta, the illegitimate daughter of the Alpha King and an omega servant, had no choice but to comply with her father's demand― marry Radulf De Lagrange, the fallen Alpha of the once-powerful Shadow Hunter Pack.Despite being the strongest dominant alpha, Radulf's influence and power crumbled when his father was accused of treason against the crown.As for Radulf's punishment? He was forced to marry a weak, wolf-less omega, who he had nothing but disdain for. To top it off, he was sent to the Western Frontier on his wedding day.Melissa eagerly awaited Radulf's return as she suffered through ridicule, believing that when he did, he would be happy to see how mighty his pack had become under her care.However, after four years, Radulf returned with a beautiful woman, shattering Melissa's heart.“You betrayed me while I stayed loyal to you. I don't want to live with you and watch your affair with another woman. Divorce me, Radulf, and free me from this marriage. If you don't wish to do that, then mark me,” Melissa demanded on the day of his return.“Divorce you, Feisty Princess? Never! If you want to get marked, then beg me or seduce me to do so,” Radulf challenged.On the day of his rut, he said, “Melissa, my mate, allow me to mark you.”

The protracted ’witch hunting’ had faded into silence with the end of the Seven Years’ War, and the mysteries of the East Coast had begun to conceal themselves, yet gunpowder was on a rapid rise. Mo Qishang, who should have been utterly confounded, stood at the crossroads of destiny in the name of Arthur. He stared in astonishment at the charging knights, the wizards atop the high towers, and the bizarre wilderness. He felt the sharpness of the longsword and the recoil of the firearm, both clear and unfamiliar. At last, he excitedly shook his robe and, with a smile on his face, said— “Do not believe what I say, for to believe is to exist!”