Mrs Fox Heinous Revenge: Can You Love A Villainess like Me? - Chapter 13: I Won’t Let You.

The world was destroyed, torn to shreds by the war as it raged on. With the falling of nuclear bombs, the mutation strangely adapted and became an entirely new element.Those who couldn't withstand this mutation became beings tethering on the edge of life and death, becoming undead.Only a small population remains on the earth now.In this small population, some can adapt to the mutation and awaken unique powers in the apocalypse, while others are entirely unaffected, still like normal people.Ray was just a normal E-class awakener, but a faithful purple crystal changed everything.Through the purple crystal, a “system” activated inside him, which could allow him to get stronger the more he spreads his genes.Necromancer, wizard, martial artist to sorcerer - every single skill was possible as long as he spread his genes.From that moment, Ray walked the path of spreading his genes “for the sake of humanity.”#no ntr, yaoi or yuri

Lucille was a top student when she suddenly passed away due to a car accident she was transmigrated to the novel that she was reading before her tragic ends, and what's worse she was transmigrated in the body of the Villainess Acantha Solaris who will also die without receiving any love from everyone.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

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!”