[Machine Translation] Sophie is an ordinary 14-year-old girl. One day, Sophie received a letter. The letter, without postmark or sender's name, contained only one line: "Who are you? Sophie was surprised by the unexpected question, "Who are you? The unexpected question made Sophie look at herself again. Who the hell am I? What Sophie had taken for granted until then, began to seem very strange to her. From that day on, strange things began to happen one after another around Sophie...