[Machine Translation] One answer to the fate of Kuro and Kotoko. A ninja novel of unknown origin. The model is Kuro? Mystery novels and manga have sold a total of 5 million copies, and this is a major turning point. The latest in the "Fictional Mystery" series by Kyo Jouhei, an author of authentic mysteries and winner of the Authentic Mystery Grand Prize! Kotoko finds a novel "Shinkuro Ninpo Ryokucho" posted on WEB, and suspects that the author is Rokka. The reason is that Kuro is used as a model. However, Rokka has no recollection of it. Who and for what purpose? Fiction and deduction are chained together in a novel that is updated in real time! ("Ninpo Fictional Reasoning") The immortal Kuro and Kotoko, the god of wisdom. Their paths lead to an answer. The greatest masterpiece of the series is finally published!