I Am an Agent in Yinshi: Visitor from Yinshi

There is a crack in the rules in Nancheng that is invisible to the world - [Midnight Market]. The Yin market does not sell gold, silver, or utensils, it only sells obsessions, life span, memory, and luck of the living. The opening of the Yin market is irregular and only attracts the nine types of people who are "missing in life, floating in their horoscopes, and lonely for half their lives". The nine protagonists in this book correspond to the nine fates of Yin City. They are indispensable. They are each other's doom and destiny. They were classmates in ordinary colleges and universities, but after a strange rain on the night of returning to school, they were collectively registered in the Yin City. From then on, there were knocks on the door in the middle of the night, endorsements on empty buildings, substitutes in the mirror, corpses hidden in old dreams, and souls of acquaintances. If you want to survive, you have to get involved. To escape, one of them must be sacrificed.