I've made a thread of this but no one answered, so I decided to let that one go and make a new one I forget where I found this novel, but it should be in jjwxc though. The ML is a poor human guy and the FL is a poor ghost. ML needed money and so did FL. As a poor ghost, FL was miserable because even in the afterlife, you still need money. If I'm not wrong, FL tried to scare ML but instead of being scared ML proposed to work together and they would split the money. It seems like they worked as exorcists.