Ghosts Know What I Experienced - Chapter 64.1: Yin-Yang Fengshui Array.

The Baron’s daughter, Alessandra Barrett, has worn a mask from a young age due to an injury. Many say if you were to see the face behind the mask, you would be cursed and die soon afterward. She is seen as a ghost, avoided by all who visit the baron’s home until she becomes the Duke’s wife.

No one could understand why the Duke would pick such a wife. Did he wish to die?

What would become of the girl who once hid in the shadows but now had the spotlight on her as the Duke’s masked wife?

What would everyone say if they were to learn the truth that she was in a contracted marriage with the Duke?

The first time they met they had battled fiercely, just for a mere bunch of herbs. She needed it to save people, and he wanted to use it to save his own life.

“Let go of it, or you will die.” The man’s violet eyes were cold and sinister as he said in a low voice.

She held on tightly to the base of the herb and pulled its roots right out of the ground, before she turned her eyes back with a crafty smile. “It’s mine now. Snatch it from me if you can.”

When they met several years later they were no longer on opposing sides in hostility. In order to repay the debt for having stolen the herb back then, she went on to miraculously cure his body’s condition, relieving him of the inhumane torment that wrecked at his body day and night. He was amazed by the godly skills in Medicine she possessed and his heart went on to fall irrecoverably head over heels in love.

- Description from novelupdates

Hiding in the Cold Palace and eventually becoming a Boss of Sorts. Li Mu was transported to a fantastical world and became a measly eunuch of the State of Xia. Despite having initially thought that his life would be a miserable one, he had unexpectedly acquired a check-in system.