I Asked You to Guard the Coffin, but I Didn't Ask You to Marry the Person in the Coffin.

The elderly people in the village will prepare a coffin for themselves in advance. The better the coffin is, the more respect it will have in the village, and it will be respected even in the underworld. And my grandfather went to the mountains to steal a priceless crystal coffin in order to gain fame in life and death! On the day my grandfather passed away, I opened the coffin and there was her inside. As a result, I embarked on a mysterious and treacherous path of yin and yang. In order to change my destiny against the will of heaven, I killed evil ghosts, defeated evil demons, broke Feng Shui, and buried seven evil gods...