『Prophecy Online』 is what is known as a scam game. It was said that those who managed to clear it will be able to obtain unlimited wealth, and the protagonist, Endou Rei, believed in those words and risked his life to challenge the game. However, what awaited him after clearing the game was its end of service, and a remaining balance of 3,584 yen. Rei wallowed in despair, thinking that it was all over, but… just a week later, the world went through a great change! Monsters started appearing in reality, and a message from the game 『Prophecy Online』 appeared in front of his eyes. While everyone was shocked and frightened, Rei, who knew about every strategy and information in the game beforehand, realized, “this is my chance…!” “I will turn this power into money!” Fearless in the face of money, his exciting solo run and money-making adventure begins now!