Surviving marriage in yandere world - Chapter 149 - 148: System: You Are Now On Your Own

The protagonist of the collapse of the three former civilizations is Dr. Mei. What is the end of logic, the strongest brain, super intelligence, this is the story of the strongest scientist of Honkai with knowledge of the moon becoming the god of science!

- Description from novelbuddy

Lin Qiao opened her eyes and found herself as a poor widow in a mountain village, with no parents-in-law, no husband, only a handsome brother-in-law who is about to turn evil.In order to survive, she put in all her effort, but...Having originally set her ambitions on raising a model young man, did she somehow raise him the wrong way?Young man, slow down! You're my little uncle!He...The once blackened villain has turned into a loyal little puppy of a boy.

Witnessing her boyfriend cheating on her with her bestie, Shiyao was so angry that she went to a pub for fun and met a man, who was really a piece of work. After a crazy night she fled away, but was embarrassed to know that the man she slept with was her boss You Ze.
Jesus, give her a break!

- Description from Novelupdates

In the world of Norse mythology, a human boy falls in love with Waltraute, the fourth Valkyrie sister. He wishes to marry her, but Waltraute gives him an impossible challenge to deter him.

Nevertheless, the boy is determined to carry out the dangerous task and to marry Waltraute afterwards.