Someone once asked, how many secrets are there in this world? I don't think anyone can answer that. Ever since humanity planted its first seed of thought, secrets have accompanied every era of history. But just like the value of a secret itself, one that is absolutely unknown to anyone is meaningless. Someone once read my fortune and told me what kind of life I would be living at some point in the future. The fortune-teller had no real certainty, but I, the one listening, sensed a truth in those words. They seemed to give this unscientific prediction an air of mystery, and so I came to regard it as something supernatural.