The Detective Is Already Dead Novel Volume 2 is written by Nigozyu with illustrations by Umibouzu.

While on an outing one day, a woman who looks exactly like Kimitsuka Kimihiko’s dead mentor, Siesta, kidnaps the former detective’s assistant and his three friends! There, she reveals a long-forgotten truth about Siesta's death. Will this be the clue that finally unlocks the secrets of his past?