MTL - The Return of Cambrian Period - Chapter 12 Global evolution

A man was transported to Ancient China and eventually became a servant of a declining household without a male heir. He utilized his wits and modern knowledge to help the household and eventually become trapped in the sea of political turmoils of the period.

- Description from Novelupdates

High school student Misumi Makoto is called into a fantasy world by the god Tsukuyomi, in order to be a hero. However, the Goddess ruling the world isn’t as thrilled to have him there, and kicks him to the edge of the world. Tsukuyomi declares that Makoto is free to find his own way after Makoto is abandoned by the other Goddess.

I was a genius in the Earthen Plane.

In her past life, Chen Wei’er was too blind to recognize people for who they were. She caused the destruction of her own family for the sake of a scum, and hurt the people who truly loved her. Fate gave her another chance to start over. In this life, she became decisive and worked hard in her career. She became a proud dance queen who managed to destroy the third-wheel who schemed against her, take revenge on the scum, and avenge all past grievances. She became a sweet wife who was coquettish and flattering, boldly seducing her aloof husband, He Xun.

His difficult wife suddenly became sweet and gentle. He Xun finally couldn’t resist holding her tight and whispered into her ear, “What do you want? I’ll give you everything. My life is yours too, so stop teasing me…”

One night, Chen Wei’er had a dream. She dreams of her past life, and the world after her death. He Xun was sitting in the hospital’s corridor, hugging her bloodied corpse as he went insane. “Had I known that in exchange of letting you go, you would die instead of being happy, I would never have let you go…” Then, He Xun killed all of her enemies and built a small wooden house in front of her grave. He never took another wife but became her grave-keeper. To think he loved her so much. Then, she learned that fate only gave her another chance to start over because this man, who had loved her for two lifetimes, had begged in front of her grave day and night for another chance in exchange for a lifetime of loneliness…