I Tell Fortunes, I Don't Exorcise Ghosts

Chu Huan is an heir to a family of fortune-tellers. While attending university, he tells fortunes for people. Then one day, his father suddenly tells him he has a wife now, and she's none other than the ruler of the underworld. If he doesn't marry her, he won't be able to stay alive.

Chu Huan: I only agreed because I had no choice! I can tell fortunes, but I can't catch ghosts!

Later, he came around...

Premise: A single thought can lead to good or evil