Seven shadowless dead people appeared one after another in Qichao City. In the mouth of the seventh person, there was a crescent copper coin engraved with the name of the corpse collector Lu Wujiu. That night, his sister, who had been dead for eleven years, knocked on his door.
In this world, the moon can fulfill any wish, but it will take the price from the future: lifespan, memory, name, and even happiness that has not yet happened. Only Lu Wujiu could hear the sound of "Moon Debt".
In order to find out the truth about his sister's return, he embarked on the road to recover his monthly debt. Until a strange message appeared in the black book: You have saved her like this six times.
And this time, it will be the entire world that pays the price.
A very nice book