Reborn as an Yandere : Yandere X Yandere - Chapter 1: Fable and Predictor

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

An accident gave Ye Han a magical ability to see through. Since then, his life has become rich and colorful. He has developed the strongest business empire, dominated the gambling world, and rejuvenated his medical skills. He has become a master of medicine and Taoism. The goddesses rushed towards him one after another. As a man, and a limited edition man, Ye Han was under a lot of pressure and had to go on an exploration with a few tomb robbers. However, a shocking secret from ancient times to the present gradually emerged. in front of him!

- Description from novelbuddy

Yang Feng somehow transmigrated into a different world and received a legacy of an ‘ancient high tech’ family, which does not directly raise his power, but gives him the technology to build things which are way more advanced than the seemingly medieval world.

After dying alone in a mental institution, Fang Junrong discovered that she was the evil mother-in-law in a prominent family doting novel. Her daughter-in-law was the female lead who was loved by all.

In the novel, the female lead was kind and nice, and the male lead loved her so much that he’d die for her in a heartbeat.

Her future father-in-law doted on her and treated her better than his own daughter.

Fang Junrong, the evil mother-in-law, was the only one who didn’t care for her. She had gotten the evil character’s script and wanted to set the female lead up every chance that she got and finally landed herself in the mental institution.

After she was rebirthed and facing her son who wanted her blessings, Fang Junrong tore up the script. Whoever wanted the role of the evil mother-in-law could have it! She was going to get a divorce and take half of the money, then she’d figure out where she wanted to go from there!