Marry a Snake? No, I Can't Stand It!

"The black coffin is for hire, and the two surnames sign a contract. When an auspicious day comes, all ghosts will carry the coffin." My mother was swept away by a flood after she gave birth to me, and everyone regarded me as an ominous person. I grew up sleeping in a coffin until I was eighteen years old, when I started having shameful dreams that made me blush and my heart beat. Later, the man in black clothes really appeared in the dream. He said that my ancestor of the Bai family had dug out his snake gallbladder a long time ago, and now he wanted to use me to repay it. He gave me a mountain ghost coin engraved with snake patterns and said I was his wife... From then on, he threatened that my mother was still alive and asked me to accompany him to all the weird places to find the snake gall he lost. But none of us thought that the snake gall we were looking for was actually on my body all along...