Later, He Became A Royal Healer - Chapter 92 - Tooth.

An engagement paper to lock one’s destiny. With her family facing financial difficulties, she marries into the family of the richest man in Qingzhou as his wife. Her Mother-In-Law’s doubtfulness; her husband’s childhood sweetheart; her mean elder sister-in-law; her narrow-minded younger sister-in-law… Being inferior, Sang Wan withdraws without a choice. As time passed, she ended up being lonely and died tragically.

Reborn on a sedan chair, how shall she proceed? Standing right at the cause of the tragedy when everything restarts, can she change her fate and find her beautiful melody?

- Description from novelupdates

The story follows the protagonist, who wakes up one day to find himself in the body of Licht, a villain from a novel he was reading. Licht is a notorious villain who is known for his cruelty and ambition. However, the protagonist soon discovers that he has a natural talent for villainy. He quickly rises through the ranks of the evil organization and becomes a powerful force in the kingdom.

After the fall of the Galactic Federation, long-time lovers Lu Li and Xie Jianwei defeated the alien invaders, and formed the Empire with Lu Li as marshal. Everyone thought that all was well between them, but.

Xie Jianwei one day found out that Lu Li’s personality had split into several parts.

They were all individuals, yet still the same Lu Li. How could Xie Jianwei bear to watch as each Lu Li plot to kill the other?

Xie Jianwei used his SSS-class spiritual strength to enter Lu Li’s inner world, where Lu Li was god/director/actor all in one. To get to the bottom of the mystery, Xie Jianwei had to act along Lu Li’s delusions, else the dreamworld would collapse, worsening Lu Li’s condition, and split the personalities even further.

- Description from Novelupdates