I'm Scattering IQ to the Protagonist - Chapter 114.1

Ji Yan discovered his wife, who hated him so much that she wished he was dead, had lost her memory after a car crash. She had changed so much it was like she was a totally different person…

Ye Yu transmigrated into a fantasy world and awakened the Dream Simulation System. After each dream, he could randomly acquire a power from the dream. Initially, Ye Yu planned to slowly grow stronger this way until he could dominate the entire world. As time passed, Ye Yu experienced more and more dreams. But he later discovered that the wives in his dreams actually existed in reality. As the saying goes, having one girlfriend is dangerous, but having many girlfriends is life-threatening. When these immensely powerful demonesses and empresses started showing up one by one, Ye Yu’s first reaction was to run away.

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

- Description from Novelupdates

She is an elder miss from a modern secret society family. She is very cold and heartless, but her appearance is very enchanting. She thinks of men as playthings. She was schemed against and her body was thrown into the sea.